mp-geo Metapost package with ConTeXt

mp-geo Metapost package with ConTeXt

[Gavin]

Hello ConTeXters,

I’d like to use the mp-geo Metapost package with ConTeXt to draw simple globes viewed from various directions. The package is here:

	https://melusine.eu.org/syracuse/poulecl/mp-geo/

It looks like the last update was 2008 and I don’t read French, so I though my chances of getting anything to work were pretty small. However, I was pleasantly surprised that this MWE found the mp-geo package, the necessary Metapost files in the ConTeXt installation, and the data files.

\starttext
\startMPcode
input mp-geo;
figure(-10u,-10u,10u,10u);
Mercator(3,48,30);
fin;
end
\stopMPcode
\stoptext

While all of the files were found, it did not produce a globe. Instead I got an error complaining about an invalid character in the data files. This error is repeated for about 20 files (a small fraction of the total). I put the first error and its data file below. All the others are identical with different .dat files.

Maybe it’s just an encoding mismatch or a hidden character I can easily delete or replace. On the other hand, maybe I shouldn't even be attempting this? 2008 is a long time ago in ConTeXt time. Feel free to tell me this project is crazy, but if you have an idea how I can make this work, I’d really appreciate it! It looks like a fun package.

Thanks!
Gavin


Error Log: (This error log below is actually from running Metapost directly on just the .mp file with the metapost code above. This error log is slightly more clear in its formatting than the ConTeXt log, but contains the same information.)

! Text line contains an invalid character.
<scantokens> ^^@
                
<to be read again> 
                   ;
Lecture->...nblec:=scantokens.readfrom.NomFichier;
                                                  for.w=1upto.nblec:if.proje...

Mercator->...((EXPR4));Lecture("Cameriquesud.dat")
                                                  ;Lecture("Ccaraibes.dat");...
l.3 Mercator(3,48,30)
                     ;
? 
! An expression can't begin with `;'.
<inserted text> 
                0
<to be read again> 
                   ;
Lecture->...nblec:=scantokens.readfrom.NomFichier;
                                                  for.w=1upto.nblec:if.proje...

Mercator->...((EXPR4));Lecture("Cameriquesud.dat")
                                                  ;Lecture("Ccaraibes.dat");...
l.3 Mercator(3,48,30)
                     ;


Data file Cameriquesud.dat is pretty short:

16
arborescence&"bresil.dat",vert
arborescence&"uruguay.dat",jaune
arborescence&"paraguay.dat",jaune
arborescence&"bolivie1.dat",bleu
arborescence&"bolivie2.dat",bleu
arborescence&"argentine1.dat",rouge
arborescence&"argentine2.dat",rouge
arborescence&"chili1.dat",violet
arborescence&"chili2.dat",violet
arborescence&"guineef.dat",jaune
arborescence&"surinam.dat",rouge
arborescence&"guyane.dat",orange
arborescence&"venezuela.dat",bleu
arborescence&"colombie.dat",rouge
arborescence&"perou.dat",rose
arborescence&"equateur.dat",jaune

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Re: mp-geo Metapost package with ConTeXt

[Hans Hagen]

On 7/14/2021 4:43 PM, Gavin wrote:
> Hello ConTeXters,
> 
> I’d like to use the mp-geo Metapost package with ConTeXt to draw simple globes viewed from various directions. The package is here:
> 
> 	https://melusine.eu.org/syracuse/poulecl/mp-geo/
> 
> It looks like the last update was 2008 and I don’t read French, so I though my chances of getting anything to work were pretty small. However, I was pleasantly surprised that this MWE found the mp-geo package, the necessary Metapost files in the ConTeXt installation, and the data files.
> 
> \starttext
> \startMPcode
> input mp-geo;
> figure(-10u,-10u,10u,10u);
> Mercator(3,48,30);
> fin;
> end
> \stopMPcode
> \stoptext
> 
> While all of the files were found, it did not produce a globe. Instead I got an error complaining about an invalid character in the data files. This error is repeated for about 20 files (a small fraction of the total). I put the first error and its data file below. All the others are identical with different .dat files.
> 
> Maybe it’s just an encoding mismatch or a hidden character I can easily delete or replace. On the other hand, maybe I shouldn't even be attempting this? 2008 is a long time ago in ConTeXt time. Feel free to tell me this project is crazy, but if you have an idea how I can make this work, I’d really appreciate it! It looks like a fun package.
Looks interesting (I didn't know about it, also the surface stuff). 
Anyway, the message relates to scantokens not liking what gets read from 
a file, quite probably a missing file (I'll make it return a different 
message but still one needs to be aware of the fact that fiel reading in 
mp is kind of weird so it really expects a file).

That said, there are some issues that you need to sort out: no btex/etex 
and no TEX command but textext instead. You could ask the authors.

There are indeed funny characters in the files but nothing your 
bilingual local context user group member Alan couldn't help you with (a 
good reason to visit him. My french is too rusty (even with some french 
music running in the background right now.)

If you can get that code running it makes a nice article.

Hans

PS. 2008 is not that old, many context commands date from the 90's


-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
        tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
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___________________________________________________________________________________

Re: mp-geo Metapost package with ConTeXt

[Aditya Mahajan]

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On Thu, 15 Jul 2021, Hans Hagen wrote:

> On 7/14/2021 4:43 PM, Gavin wrote:
> > Hello ConTeXters,
> > 
> > I’d like to use the mp-geo Metapost package with ConTeXt to draw simple
> globes viewed from various directions. The package is here:
> > 
> > 	https://melusine.eu.org/syracuse/poulecl/mp-geo/
> > 
> > It looks like the last update was 2008 and I don’t read French, so I though
> my chances of getting anything to work were pretty small. However, I was
> pleasantly surprised that this MWE found the mp-geo package, the necessary
> Metapost files in the ConTeXt installation, and the data files.
> > 
> > \starttext
> > \startMPcode
> > input mp-geo;
> > figure(-10u,-10u,10u,10u);
> > Mercator(3,48,30);
> > fin;
> > end
> > \stopMPcode
> > \stoptext
> > 
> > While all of the files were found, it did not produce a globe. Instead I got
> an error complaining about an invalid character in the data files. This error
> is repeated for about 20 files (a small fraction of the total). I put the
> first error and its data file below. All the others are identical with
> different .dat files.
> > 
> > Maybe it’s just an encoding mismatch or a hidden character I can easily
> delete or replace. On the other hand, maybe I shouldn't even be attempting
> this? 2008 is a long time ago in ConTeXt time. Feel free to tell me this
> project is crazy, but if you have an idea how I can make this work, I’d really
> appreciate it! It looks like a fun package.
> Looks interesting (I didn't know about it, also the surface stuff). 
> Anyway, the message relates to scantokens not liking what gets read from 
> a file, quite probably a missing file (I'll make it return a different 
> message but still one needs to be aware of the fact that fiel reading in 
> mp is kind of weird so it really expects a file).

Actually the data files are fairly simple: 

no_of_points
<list of coordinates>

So, it would be much simpler to read and parse it via lua rather than scantokens. Rest of the code simply determines a "view" of what to show. So, it can be a good exercise in lua-MP interface.

Aditya

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Re: mp-geo Metapost package with ConTeXt

[Hans Hagen]

On 7/15/2021 6:22 PM, Aditya Mahajan wrote:
> On Thu, 15 Jul 2021, Hans Hagen wrote:
> 
>> On 7/14/2021 4:43 PM, Gavin wrote:
>>> Hello ConTeXters,
>>>
>>> I’d like to use the mp-geo Metapost package with ConTeXt to draw simple
>> globes viewed from various directions. The package is here:
>>>
>>> 	https://melusine.eu.org/syracuse/poulecl/mp-geo/
>>>
>>> It looks like the last update was 2008 and I don’t read French, so I though
>> my chances of getting anything to work were pretty small. However, I was
>> pleasantly surprised that this MWE found the mp-geo package, the necessary
>> Metapost files in the ConTeXt installation, and the data files.
>>>
>>> \starttext
>>> \startMPcode
>>> input mp-geo;
>>> figure(-10u,-10u,10u,10u);
>>> Mercator(3,48,30);
>>> fin;
>>> end
>>> \stopMPcode
>>> \stoptext
>>>
>>> While all of the files were found, it did not produce a globe. Instead I got
>> an error complaining about an invalid character in the data files. This error
>> is repeated for about 20 files (a small fraction of the total). I put the
>> first error and its data file below. All the others are identical with
>> different .dat files.
>>>
>>> Maybe it’s just an encoding mismatch or a hidden character I can easily
>> delete or replace. On the other hand, maybe I shouldn't even be attempting
>> this? 2008 is a long time ago in ConTeXt time. Feel free to tell me this
>> project is crazy, but if you have an idea how I can make this work, I’d really
>> appreciate it! It looks like a fun package.
>> Looks interesting (I didn't know about it, also the surface stuff).
>> Anyway, the message relates to scantokens not liking what gets read from
>> a file, quite probably a missing file (I'll make it return a different
>> message but still one needs to be aware of the fact that fiel reading in
>> mp is kind of weird so it really expects a file).
> 
> Actually the data files are fairly simple:
> 
> no_of_points
> <list of coordinates>
> 
> So, it would be much simpler to read and parse it via lua rather than scantokens. Rest of the code simply determines a "view" of what to show. So, it can be a good exercise in lua-MP interface.

I was wondering about that too. I admit that I looked into maps years 
ago but never could find quality data files.

\starttext

\startluacode
     function mp.maptopath(filename)
         local t = { cycle = true }
         for x, y in 
string.gmatch(io.loaddata(filename),"%(([%+%-%d]+),([%+%-%d]+)%)") do
             t[#t+1] = { tonumber(x), tonumber(y) }
         end
         mp.inject.path(t)
     end
\stopluacode

\startMPpage
     draw lua.mp.maptopath("slovenia.dat") ;
\stopMPpage

\startMPpage
     draw lua.mp.maptopath("usa1.dat") rotated 90 ;
\stopMPpage

\startMPpage
     draw lua.mp.maptopath("usa2.dat") ;
\stopMPpage

\stoptext

way to low quality ... we also want multiple shapes i guess .. i wonder 
if someone knows where to get good free data

(projections are more your turf)

Hans


-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
        tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
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___________________________________________________________________________________

Re: mp-geo Metapost package with ConTeXt

[Bruce Horrocks]

On 15 Jul 2021, at 18:58, Hans Hagen <j.hagen@xs4all.nl> wrote:
> 
> I was wondering about that too. I admit that I looked into maps years ago but never could find quality data files.

Does this help?
<https://www.naturalearthdata.com>

—
Bruce Horrocks
Hampshire, UK

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___________________________________________________________________________________

Re: mp-geo Metapost package with ConTeXt

[Gavin]

[-- Attachment #1.1: Type: text/plain, Size: 2090 bytes --]

Hi Hans, Aditya, and all,

Me:
>>>> I’d like to use the mp-geo Metapost package with ConTeXt to draw simple
>>> globes viewed from various directions. The package is here:
>>>> 
>>>> 	https://melusine.eu.org/syracuse/poulecl/mp-geo/ <https://melusine.eu.org/syracuse/poulecl/mp-geo/>

Aditya:
>> Actually the data files are fairly simple:
>> no_of_points
>> <list of coordinates>
>> So, it would be much simpler to read and parse it via lua rather than scantokens. Rest of the code simply determines a "view" of what to show. So, it can be a good exercise in lua-MP interface.

Hans:
> I was wondering about that too. I admit that I looked into maps years ago but never could find quality data files.

This is great fun! I slightly altered Hans’ code to produce the most basic area preserving projection of North America (code and map below). If anyone else is playing with the mp-geo data, it is in arc minutes, so divide by 60 to get degrees.

For my book I only want 5cm diameter globes with continents, so the map data in the mp-geo package is far more detailed than I need. The code is so fast, the detail doesn’t seem to be a problem.

I just started learning Metapost a month ago, and it’s great. I know almost nothing about Lua, but this looks like a fun project for learning more!

Thanks!
Gavin


P.S. I marked the location of our local ConTeXt users group on the map, in case any of you want to visit.


\starttext

\startluacode
  function mp.maptopath(filename)
      local t = { cycle = true }
      for phi, theta in string.gmatch(io.loaddata(filename),"%(([%+%-%d]+),([%+%-%d]+)%)") do
          t[#t+1] = { math.cosd(tonumber(phi)/60)*tonumber(theta+6125)/12, tonumber(phi)/12 }
      end
      mp.inject.path(t)
  end
\stopluacode

\startMPpage
  fill lua.mp.maptopath("data/usa1.dat");
  fill lua.mp.maptopath("data/usa2.dat") ;
  fill lua.mp.maptopath("data/mexique.dat") ;
  fill lua.mp.maptopath("data/canada.dat") ;
  fill fullcircle scaled 5 shifted (0, 203) withcolor white;
\stopMPpage

\stoptext





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Re: mp-geo Metapost package with ConTeXt

[Hans Hagen]

On 7/16/2021 4:53 PM, Gavin Polhemus wrote:

> P.S. I marked the location of our local ConTeXt users group on the map, in case any of you want to visit.
1/3rd of your user group fled the country and is way closer by where i 
live now,

Hans


-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
        tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
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___________________________________________________________________________________

Re: mp-geo Metapost package with ConTeXt

[Hans Hagen]

On 7/15/2021 10:30 PM, Bruce Horrocks wrote:
> On 15 Jul 2021, at 18:58, Hans Hagen <j.hagen@xs4all.nl> wrote:
>>
>> I was wondering about that too. I admit that I looked into maps years ago but never could find quality data files.
> 
> Does this help?
> <https://www.naturalearthdata.com>
i was halfway writing as reader for that fiel format when i noticed that 
is is also quite low res so i gave up on that and started playing 
(extending) with an more interesting alternative that mojca and i wrote 
years ago at a meeting

Hans




-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
        tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
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___________________________________________________________________________________

Re: mp-geo Metapost package with ConTeXt

[Alan Braslau]

On 16/07/21 21:51, Hans Hagen wrote:
> On 7/16/2021 4:53 PM, Gavin Polhemus wrote:
> 
>> P.S. I marked the location of our local ConTeXt users group on the 
>> map, in case any of you want to visit.
> 1/3rd of your user group fled the country and is way closer by where i 
> live now,

And in the same time zone!

-- 
Alan
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Re: mp-geo Metapost package with ConTeXt

[Bruce Horrocks]

> On 16 Jul 2021, at 20:55, Hans Hagen <j.hagen@xs4all.nl> wrote:
> 
> On 7/15/2021 10:30 PM, Bruce Horrocks wrote:
>> On 15 Jul 2021, at 18:58, Hans Hagen <j.hagen@xs4all.nl> wrote:
>>> 
>>> I was wondering about that too. I admit that I looked into maps years ago but never could find quality data files.
>> Does this help?
>> <https://www.naturalearthdata.com>
> i was halfway writing as reader for that fiel format when i noticed that is is also quite low res so i gave up on that and started playing (extending) with an more interesting alternative that mojca and i wrote years ago at a meeting

Off the top of my head I'm not aware of any higher resolution sources of global data - what scale were you thinking of?

For the UK there are free maps down to street level, either as a single file or API. The API details are here:
<https://www.ordnancesurvey.co.uk/business-government/products/maps-api>

The license allows free use for apps made available to the public.

—
Bruce Horrocks
Hampshire, UK

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Re: mp-geo Metapost package with ConTeXt

[Henning Hraban Ramm]

> Am 17.07.2021 um 11:53 schrieb Bruce Horrocks <ntg@scorecrow.com>:
> 
> 
> 
>> On 16 Jul 2021, at 20:55, Hans Hagen <j.hagen@xs4all.nl> wrote:
>> 
>> On 7/15/2021 10:30 PM, Bruce Horrocks wrote:
>>> On 15 Jul 2021, at 18:58, Hans Hagen <j.hagen@xs4all.nl> wrote:
>>>> 
>>>> I was wondering about that too. I admit that I looked into maps years ago but never could find quality data files.
>>> Does this help?
>>> <https://www.naturalearthdata.com>
>> i was halfway writing as reader for that fiel format when i noticed that is is also quite low res so i gave up on that and started playing (extending) with an more interesting alternative that mojca and i wrote years ago at a meeting
> 
> Off the top of my head I'm not aware of any higher resolution sources of global data - what scale were you thinking of?

Can you work with OpenStreetMap data?

https://planet.openstreetmap.org
http://download.geofabrik.de
https://download.bbbike.org/osm/

I didn’t find excerpts that only have e.g. country borders or rivers. But with usual XML tools you could extract those.

Hraban
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Re: mp-geo Metapost package with ConTeXt

[Hans Hagen]

On 7/17/2021 12:20 PM, Henning Hraban Ramm wrote:
> 
>> Am 17.07.2021 um 11:53 schrieb Bruce Horrocks <ntg@scorecrow.com>:
>>
>>
>>
>>> On 16 Jul 2021, at 20:55, Hans Hagen <j.hagen@xs4all.nl> wrote:
>>>
>>> On 7/15/2021 10:30 PM, Bruce Horrocks wrote:
>>>> On 15 Jul 2021, at 18:58, Hans Hagen <j.hagen@xs4all.nl> wrote:
>>>>>
>>>>> I was wondering about that too. I admit that I looked into maps years ago but never could find quality data files.
>>>> Does this help?
>>>> <https://www.naturalearthdata.com>
>>> i was halfway writing as reader for that fiel format when i noticed that is is also quite low res so i gave up on that and started playing (extending) with an more interesting alternative that mojca and i wrote years ago at a meeting
>>
>> Off the top of my head I'm not aware of any higher resolution sources of global data - what scale were you thinking of?
> 
> Can you work with OpenStreetMap data?
> 
> https://planet.openstreetmap.org
> http://download.geofabrik.de
> https://download.bbbike.org/osm/
> 
> I didn’t find excerpts that only have e.g. country borders or rivers. But with usual XML tools you could extract those.
Indeed, that is what I was referring too. Mojca found this:

   https://osm-boundaries.com/

At a bachotex meeting (years ago, when the ctx group donated a nice 
roadmap display to the conference) we made an openstreetmap -> metapost 
style but afaik that never made it into a module. So, when I remembered 
that I updated it. I can now render my hometown (need to figure out 
colors) quite okay. (One can export an osm file in openstreetmap but 
with some limitations on size.)

I have to play a bit more with the style before I define it useable but 
the interface is liek this:

% where i live

\startMPpage
     draw lmt_openstreetmap [
         filename = "hasselt.osm"
         grid     = "dots",
     ] ;
\stopMPpage

% island in paris

\startMPpage
     draw lmt_openstreetmap [
         filename = "e:/tmp/map.osm"
     ] ;
\stopMPpage

The hasselt osm file is sime 12 MB, the colorful hasselt pdf file just 
below 1 MB so that's okay (3.7 sec processing time on my machine so if 
all claims are right sub seconds on a fast new apple).

Of course I need to make colors and what gets rendered configurable (via 
the interface). It's more about the fun aspect .. no need to typeset 
complete routes because that's what the web is for.

Hans


-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
        tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
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Re: mp-geo Metapost package with ConTeXt

[Henning Hraban Ramm]

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> Am 17.07.2021 um 12:20 schrieb Henning Hraban Ramm <texml@fiee.net>:
> 
>> 
>> Am 17.07.2021 um 11:53 schrieb Bruce Horrocks <ntg@scorecrow.com>:
>> 
>> 
>> 
>>> On 16 Jul 2021, at 20:55, Hans Hagen <j.hagen@xs4all.nl> wrote:
>>> 
>>> On 7/15/2021 10:30 PM, Bruce Horrocks wrote:
>>>> On 15 Jul 2021, at 18:58, Hans Hagen <j.hagen@xs4all.nl> wrote:
>>>>> 
>>>>> I was wondering about that too. I admit that I looked into maps years ago but never could find quality data files.
>>>> Does this help?
>>>> <https://www.naturalearthdata.com>
>>> i was halfway writing as reader for that fiel format when i noticed that is is also quite low res so i gave up on that and started playing (extending) with an more interesting alternative that mojca and i wrote years ago at a meeting
>> 
>> Off the top of my head I'm not aware of any higher resolution sources of global data - what scale were you thinking of?
> 
> Can you work with OpenStreetMap data?
> 
> https://planet.openstreetmap.org
> http://download.geofabrik.de
> https://download.bbbike.org/osm/
> 
> I didn’t find excerpts that only have e.g. country borders or rivers. But with usual XML tools you could extract those.

There’s https://osm-boundaries.com, but it doesn’t really work (for me).

You should also be able to select elements via Overpass API, but it doesn’t work reliably for me at http://overpass-turbo.eu

This is the query for mainland Netherlands:
curl --remote-name --remote-header-name --location --max-redirs -1 "https://osm-boundaries.com/Download/Submit?db=osm20210531&osmIds=-2323309,-1216720&format=GeoJSON&srid=4326&simplify=1"

You also need an API key that depends on your OSM account. Result attached.

Hraban


[-- Attachment #2: OSMB-dcc52d93616707aa0f6d582c82816ed1034354d6.geojson.gz --]
[-- Type: application/x-gzip, Size: 1540 bytes --]

[-- Attachment #3: Type: text/plain, Size: 493 bytes --]

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: mp-geo Metapost package with ConTeXt

[Hans Hagen]

[-- Attachment #1: Type: text/plain, Size: 574 bytes --]

Hi,

Just as an example, the context meeting is att the attached location:

   50°45’7” / 5°35’19”

https://www.openstreetmap.org/export#map=18/50.75175/5.58883

(Okay, I need to use a railway track dash pattern "railway".)

Hans

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
        tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------

[-- Attachment #2: m-openstreetmap.pdf --]
[-- Type: application/pdf, Size: 21614 bytes --]

[-- Attachment #3: Type: text/plain, Size: 493 bytes --]

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: mp-geo Metapost package with ConTeXt

[Henning Hraban Ramm]

[-- Attachment #1: Type: text/plain, Size: 3610 bytes --]


> Am 17.07.2021 um 12:45 schrieb Hans Hagen <j.hagen@xs4all.nl>:
> 
> On 7/17/2021 12:20 PM, Henning Hraban Ramm wrote:
>>> Am 17.07.2021 um 11:53 schrieb Bruce Horrocks <ntg@scorecrow.com>:
>>> 
>>> 
>>> 
>>>> On 16 Jul 2021, at 20:55, Hans Hagen <j.hagen@xs4all.nl> wrote:
>>>> 
>>>> On 7/15/2021 10:30 PM, Bruce Horrocks wrote:
>>>>> On 15 Jul 2021, at 18:58, Hans Hagen <j.hagen@xs4all.nl> wrote:
>>>>>> 
>>>>>> I was wondering about that too. I admit that I looked into maps years ago but never could find quality data files.
>>>>> Does this help?
>>>>> <https://www.naturalearthdata.com>
>>>> i was halfway writing as reader for that fiel format when i noticed that is is also quite low res so i gave up on that and started playing (extending) with an more interesting alternative that mojca and i wrote years ago at a meeting
>>> 
>>> Off the top of my head I'm not aware of any higher resolution sources of global data - what scale were you thinking of?
>> Can you work with OpenStreetMap data?
>> https://planet.openstreetmap.org
>> http://download.geofabrik.de
>> https://download.bbbike.org/osm/
>> I didn’t find excerpts that only have e.g. country borders or rivers. But with usual XML tools you could extract those.
> Indeed, that is what I was referring too. Mojca found this:
>  https://osm-boundaries.com/

Ah, our mails crossed...

> At a bachotex meeting (years ago, when the ctx group donated a nice roadmap display to the conference) we made an openstreetmap -> metapost style but afaik that never made it into a module. So, when I remembered that I updated it. I can now render my hometown (need to figure out colors) quite okay. (One can export an osm file in openstreetmap but with some limitations on size.)
> 
> I have to play a bit more with the style before I define it useable but the interface is liek this:
> 
> % where i live
> 
> \startMPpage
>    draw lmt_openstreetmap [
>        filename = "hasselt.osm"
>        grid     = "dots",
>    ] ;
> \stopMPpage
> 
> % island in paris
> 
> \startMPpage
>    draw lmt_openstreetmap [
>        filename = "e:/tmp/map.osm"
>    ] ;
> \stopMPpage
> 
> The hasselt osm file is sime 12 MB, the colorful hasselt pdf file just below 1 MB so that's okay (3.7 sec processing time on my machine so if all claims are right sub seconds on a fast new apple).
> 
> Of course I need to make colors and what gets rendered configurable (via the interface). It's more about the fun aspect .. no need to typeset complete routes because that's what the web is for.

For our architectural guides I make maps with OSM data and Maperitive. It’s a PITA (sooo slow with Mono on OSX and hadly documented), but works.
Maperitive uses "mrules" style files (example attached).

[call]

mono --desktop Maperitive/Maperitive.Console.exe -defaultscript=false ../baukultur.mscript
inkscape -z -f citymap.svgz -A citymap.pdf


[baukultur.mscript]

set-setting name=map.decoration.attribution value=false
set-setting name=map.decoration.grid value=false
set-setting name=map.decoration.scale value=false
set-setting name=map.rendering.font-family value="AlegreyaSans"

use-ruleset location=Maperitive/Rules/baukultur.mrules
// load some additional data, e.g. markers
load-source archiguide.osm
// exported OSM city map
load-source bonn.osm

// Stadthalle BG
move-pos y=50.68064 x=7.15849 zoom=17
set-home
set-geo-bounds 7.153,50.6840,7.162,50.6772
set-print-bounds-geo 7.153,50.6840,7.162,50.6772
export-svg file=citymap.svgz compatibility=inkscape map-scale=5000


Hraban



[-- Attachment #2: baukultur.mrules --]
[-- Type: application/octet-stream, Size: 32360 bytes --]

// Archiguide rendering rules for Maperitive based on default (Mapnik)
// http://maperitive.net

// Created by Igor Brejc, adapted by Hraban Ramm
// Released under the Creative Commons Attribution-ShareAlike 3.0 License (http://creativecommons.org/licenses/by-sa/3.0/)
// Updates by Michael <quelbs_at_gmail.com>
// Icons used: Map icons CC-0 from SJJB Management (http://www.sjjb.co.uk/mapicons)

features
	points, areas
		parking : amenity=parking
		// postbox : amenity=post_box
		postoffice : amenity=post_office
		// telephone : amenity=telephone
		fire station : amenity=fire_station
		police station : amenity=police
		hospital : building=hospital
		// recycling : amenity=recycling
		church : amenity=place_of_worship AND religion=christian
		// drinking water : amenity=drinking_water
		// bank : amenity=bank
		// atm : amenity=atm
		// toilets : amenity=toilets
		library : amenity=library
		tree : natural=tree
		school : amenity=school
		bus stop : highway=bus_stop
		railway station : railway=station
		mini roundabout : highway=mini_roundabout
		gate : barrier=gate
		tourism viewpoint : tourism=viewpoint
		// tourism hotel : tourism=hotel
		tourism museum : tourism=museum
		tourism attraction : tourism=attraction
		// amenity pub : amenity=pub
		// amenity fast_food : amenity=fast_food
		aerodrome : aeroway=aerodrome
		housenumber : [addr:housenumber]
	// These are not shown on Mapnik
		puffin : crossing_ref=puffin
		memorial : historic=memorial


	areas
		beach : natural=beach
		building : building
		//=yes OR building=hospital OR building=university OR building=college OR building=school
		water : natural=water OR waterway=riverbank OR landuse=reservoir OR landuse=basin OR waterway=dock
		village green : landuse=village_green
		forest : landuse=forest OR natural=wood
		farm : landuse=farm
		farmyard : landuse=farmyard
		grass : landuse=grass
		fell : natural=fell
		glacier : natural=glacier
		national park : boundary=national_park
		allotments : landuse=allotments
		academic : node[@isOneOf(amenity, university, college, school)] area[@isOneOf(amenity, university, college, school)]
		meadow : natural=meadow OR landuse=meadow
		nature reserve : leisure=nature_reserve
		// playground : leisure=playground
		car park: amenity=parking
		track : leisure=track
		graveyard : amenity=grave_yard OR landuse=cemetery
		military : landuse=military OR military=barracks
		park : leisure=park
		// leisure garden : leisure=garden
		leisure pitch : leisure=pitch
		leisure stadium : leisure=stadium
		//landuse retail : landuse=retail
		landuse industrial : landuse=industrial
		//commercial area : landuse=commercial
		residential area : landuse=residential
		aeroway apron : aeroway=apron
		aeroway terminal : aeroway=terminal
		highway pedestrian : highway=pedestrian
		orchard : landuse=orchard
		farmland : landuse=farmland
		quarry : landuse=quarry

		archipage : archiguide_page=yes

	lines
		oneway : oneway=yes OR oneway=true OR oneway=-1
		coastline : natural=coastline
		river : waterway=river
		stream : waterway=stream
		canal : waterway=canal
		drain : waterway=drain
		dock : waterway=dock
		railway rail : railway=rail
		railway lightrail : railway=light_rail
		platform : railway=platform OR public_transport=platform
		line barrier : barrier=wall OR barrier=fence
		highway motorway : highway=motorway OR (highway=construction AND construction=motorway)
		highway motorway link : highway=motorway_link OR (highway=construction AND construction=motorway_link)
		highway trunk : highway=trunk OR (highway=construction AND construction=trunk)
		highway trunk link: highway=trunk_link OR (highway=construction AND construction=trunk_link)
		highway primary link : highway=primary_link OR (highway=construction AND construction=primary_link)
		highway primary : highway=primary OR (highway=construction AND construction=primary)
		highway secondary : highway=secondary OR (highway=construction AND construction=secondary)
		highway tertiary : highway=tertiary OR (highway=construction AND construction=tertiary)
		highway unclassified : highway=unclassified OR (highway=construction AND construction=unclassified)
		highway residential : highway=residential OR (highway=construction AND construction=residential)
		highway living_street : highway=living_street OR (highway=construction AND construction=living_street)
		highway construction : highway=construction
		highway service : highway=service
		highway pedestrian : highway=pedestrian
		highway track : highway=track
		highway footway : highway=footway
		highway cycleway : highway=cycleway
		highway path : highway=path
		//highway access private : access=private AND highway
		highway access destination : access=destination AND highway
		highway steps : highway=steps
		pier : man_made=pier
		bridge foot : bridge=yes AND (foot=yes OR highway=footway)
		historic citywalls : historic=citywalls OR historic=city_wall
		power_line : power=line OR power=minor_line
		aerialway closed: @isOneOf(aerialway,cable_car,gondola,mixed_lift)
		aerialway open: @isOneOf(aerialway,chair_lift,drag_lift)

		aeroway runway : aeroway=runway
		aeroway taxiway : aeroway=taxiway

		//boundary country : boundary=administrative AND (admin_level=2 OR admin_level=4) AND NOT natural=coastline
		//boundary province : boundary=administrative AND admin_level=6
		//boundary municipal : boundary=administrative AND admin_level=8

		contour major : contour[@isMulti(elevation, 100)]
		contour minor : contour[@isMulti(elevation, 20) and not @isMulti(elevation, 100)]

		gps tracks : gpstrack[]
		gps routes : gpsroute[]

// Routes
//		route ncn : relation[type=route AND route=bicycle AND network=ncn]
//		route byway : relation[type=route AND route=bicycle AND network="National Byway"]
		route foot : relation[type=route AND route=foot]

	points
		// place city : place=city
		place town : place=town
		place village : place=village
		place hamlet : place=hamlet
		place locality: place=locality
		place isolated_dwelling : place=isolated_dwelling
		place suburb : place=suburb
		// diy : shop=doityourself
		// hair dresser : shop=hairdresser
		// supermarket : shop=supermarket
		// convenience : shop=convenience
		// bakery : shop=bakery
		// restaurant : amenity=restaurant or amenity=cafe
		// cafe : amenity=cafe
		// pharmacy : amenity=pharmacy
		peak : natural=peak
		// powertower : power=tower OR power=pole
		info : information=guidepost
		bollard : barrier=bollard
		// lift_gate : barrier=lift_gate
		aerialway station : aerialway=station
		motorway_junction : highway=motorway_junction

		gps waypoints : gpswaypoint[]
		gps trackpoints: gpstrack[].gpspoint[]
		gps routepoints: gpsroute[].gpspoint[]

		archiguide : archiguide_type=any


properties
	map-background-color	: #FFFFFF
	map-background-opacity	: 0
	map-sea-color : #B5D0D0
	font-weight : bold
	font-family : AlegreyaSans
	text: @any([[name:de]],name,int_name,[[name:en]])
	text-max-width : 7
	text-halo-width : 15%
	text-halo-opacity : 0.75
	text-align-horizontal : center
	text-align-vertical : center
	font-stretch : 0.9
	map.rendering.lflp.min-buffer-space : 5
	map.rendering.lflp.max-allowed-corner-angle : 40

rules
	target: gps tracks
		define
			line-color : red
			line-opacity : 0.75
			min-zoom : 5
			line-width : 5
		draw : line

	target: gps routes
		define
			line-color : blue
			line-opacity : 0.75
			line-style : dash
			min-zoom : 5
			line-width : 5
		draw : line

	target : gps waypoints
		define
			shape : circle
			shape-size : 8
			line-color : green
			fill-opacity : 0
		draw : shape

	target : gps trackpoints
		define
			min-zoom : 17
			shape : square
			shape-size : 10
			line-color : green
			line-width : 1
			fill-opacity : 0
		draw : shape


	target : gps routepoints
		define
			min-zoom : 12
			shape : diamond
			shape-size : 10
			line-color : green
			line-width : 1
			fill-opacity : 0
		draw : shape

// ARCHIGUIDE
	target : archiguide
		define
			min-zoom : 5
			shape : circle
			shape-size : 12
			line-color : black
			line-width : 0
			//1
			fill-color : #6ABCDE
			fill-opacity : 0.5
		for : era=1
			define
				fill-color : #00a276
		for : era=2
			define
				fill-color : #00a56c
		for : era=3
			define
				fill-color : #38a962
		for : era=4
			define
				fill-color : #55a856
		for : era=5
			define
				fill-color : #69ac4b
		for : era=6
			define
				fill-color : #6ba63f
		for : era=7
			define
				fill-color : #7ba53d
		for : era=8
			define
				fill-color : #8aa33b
		for : era=9
			define
				fill-color : #96a139
		for : era=H
			define
				fill-color : #7DB573
		for : era=D
			define
				fill-color : #B8A524
		draw : shape
		define
			min-zoom : 5
			topmost-layer : true
			text : archiguide_id
			//text : name
			font-size : 18
			// 14
			text-color : #0C8CBC
			//text-halo-width : 0
		draw : text

	target : archipage
		define
			min-zoom : 12
			line-color: magenta
			line-width: 2
			fill-color: green
			fill-opacity : 0.5
		draw : fill
		//draw : line
		define
			// topmost-layer : true
			text : archiguide_pagename
			text-color : red
			text-halo-width : 8
			font-size : 36
		draw : text

	target : $featuretype(point)
		if : place*
			define
				font-weight : bold
				text-max-width : 1000
				text-align-horizontal : near

			if : *city
				define
					font-size : 6:8;14:20
					min-zoom : 6
					max-zoom : 14
					placement-value : 1000
			elseif : *town
				define
					font-size : 9:8;12:10;20:20
					min-zoom : 9
					placement-value : 20
			elseif : *village
				define
					font-size : 12:10;20:20
					min-zoom : 12
					placement-value : 1
			elseif : *hamlet
				define
					font-size : 14:8;20:16
					min-zoom : 14
					placement-value : 0.1
			elseif : *locality
				define
					font-size : 14:8;20:16
					min-zoom : 14
					placement-value : 0.1
			elseif : *isolated_dwelling
				define
					font-size : 15:8;20:14
					min-zoom : 15
					placement-value : 0.1
			elseif : *suburb
				define
					font-size : 13:10;20:20
					min-zoom : 13
					text-color : white black 50%
					placement-value : 10
			draw : text
		if : aerialway station
			define
				min-zoom:12
				shape:square
				shape-size:12:3;16:8
				fill-color:#7981B0
				line-style:none
				text-offset-vertical:120%
				text-color:#8888FF
			draw:shape
			draw:text


	target : housenumber
		define
			min-zoom : 17
			text : [[addr:housenumber]]
			text-halo-width : 0
			font-size : 10
			text-color: black
			//placement-value : 0.01
		//draw : text
	target : playground
		define
			fill-color : #CCFEF0
			line-style : none
		draw : fill
		define
			line-color : #ADCCB5
			line-width : 0
		draw : line
		define
			min-zoom : 17
			placement-value : 0.05
		draw : text

	target : $featuretype(area)
		define
			line-style : none
			//line-width : 1
		if : forest
			define
				min-zoom : 9
				fill-color : #8DC56C
		elseif : beach
			define
				min-zoom : 10
				fill-color : #FEFEC0
		elseif : farm
			define
				min-zoom : 9
				fill-color : #E9D8BD
		elseif : farmyard
			define
				min-zoom : 9
				fill-color : #DCBE91
		elseif : fell
			define
				fill-color : #C5FF5B black 10%
		elseif : water
			define
				fill-color : #C8E6E6
		elseif:academic
			define
				fill-color : #EEFBFF
				//line-color : #E5D2CC
				//line-style : solid
		elseif : residential area
			define
				//fill-color : #E6E6E6
				fill-color : #FFFFFF
			//draw : text
		elseif : grass
			define
				fill-color : #F0FFEF
		elseif : allotments
			define
				fill-color : #E6CA97
		elseif : meadow
			define
				fill-color : #F0FFEF
		elseif : nature reserve
			define
				fill-color : #B1E69C
		elseif : car park
			define
				fill-color : #FFFCEE
		elseif : park
			define
				fill-color : #F0FFEF
			//draw : text
		elseif : leisure garden
			define
				fill-color : #F0FFEF
			//draw : text
		elseif : graveyard
			define
				fill-color : #F0FFEF
		elseif : building
			define
				fill-color : #AAAAAA
		elseif : leisure pitch
			define
				fill-color : #77EECC
		elseif : leisure stadium
			define
				fill-color : #77EECC
				line-color : white
				line-style : solid
		elseif : track
			define
				fill-color : #77EECC
		elseif : village green
			define
				fill-color : #F0FFEF
		elseif : landuse retail
			define
				fill-color : #F0D9D9
				line-color : #F4A19E
			draw : line
		elseif : landuse industrial
			define
				fill-color : #DFD1D6
		elseif : commercial area
			define
				fill-color : #EFC8C8
		elseif : military
			define
				fill-color : #99DDBB
		elseif : aeroway*
			define
				fill-color : #E9D1FE
		elseif : orchard
			define
				fill-color : #F0FFEF
		elseif : farmland
			define
				fill-color : #F0FFEF
		elseif : aerodrome
			define
				fill-color : #e9e8e3
				line-style : solid
				line-color : #b3b3b0 black 10%
		elseif : quarry
			define
				fill-color : white
				line-style : solid
				line-color : #b3b3b0 black 10%
				fill-hatch : diagonalcross
				fill-hatch-color : #cccccc
		elseif : glacier
			define
				fill-color : #DDECEC
				line-style : dash
				line-color : #DDECEC black 10%
		elseif : *pedestrian
			for : area
				define
					min-zoom : 14
					fill-color : #EDEDED
					line-color : #B1B1B1 black 20%
					line-style : solid
				draw : text
		else
			stop
		draw : fill
		if : building
			define
				min-zoom : 15
				line-style : solid
				line-width : 0.25
				line-color : #ffffff
			draw : line
		//for : amenity=hospital
			//stop
		define
			min-zoom : 17
		if:academic
			define
				min-zoom:16
		draw : text

//		aeroway taxiway : aeroway=taxiway
//		aeroway apron : aeroway=apron
//		aeroway terminal : aeroway=terminal

	target : aeroway runway
		define
			min-zoom : 11
			line-color : #BBBBCC
			line-width : 11:2;15:20
		draw : line

	target : aeroway taxiway
		define
			min-zoom : 11
			line-color : #BBBBCC
			line-width : 11:1;15:6
		draw : line

	target : glacier
		define
			min-zoom : 10
			text-color : #A3A3FE
		draw : text

	target : boundary*
		define
			line-color : #9E1A99
			line-opacity : 0.5
		if : boundary country
			define
				line-width : 6:1;9:3;10:6
		elseif : boundary province
			define
				min-zoom : 4
				line-width : 4:1;11:3
				line-style : dash
		elseif : boundary municipal
			define
				min-zoom : 12
				line-width : 12:1;14:2
				line-style : dash
		draw : line

	target : national park
		define
			fill-color : #8DC56C
			fill-opacity : 0.2
			line-style : none
		draw : fill
		define
			line-color : #8DC56C black 20%
			line-opacity : 0.5
			line-width : 3
			line-style : dash
			font-size : 3:3;12:12
			text-color : green
			font-weight : normal
		draw : line
		draw : text

	target : peak
		define
			shape : triangle
			shape-size : 12
			fill-color : #D08F55
			line-style : none
			min-zoom : 11
		draw : shape
		define
			text : @if(name, name @if(ele, "\n(" ele ")"), ele)
			text-color : #ae4242
			min-zoom : 13
			font-size : 10
			text-max-width : 10
			text-offset-vertical : 100%
			text-align-vertical : near
		draw : text

	target : info
		define
			min-zoom : 16
			text : "i"
			text-color : #734A08
			font-size : 20
			font-family : Alegreya-Regular
			text-halo-width : 0
		draw : text
	target : lift_gate
		define
			min-zoom : 16
			shape : custom
			shape-def : f:#3E3E3E;p:#3E3E3E;-1,1;-1,-3;-3,-3;-3,3;-1,3;-1,2;4,2;4,1;Z
			shape-size : 14:7;20:12
			line-width : 1
		draw : shape
	target : bollard
		define
			min-zoom : 16
			fill-color : #7D7D7D
			line-style : none
			shape-size : 16:1;18:2
		draw : shape
	target : powertower
		define
			min-zoom: 14
			shape : custom
			shape-def : m:-1,1;l:1,1,1,-1,-1,-1,-1,1,1,-1;m:-1,-1;l:1,1
			shape-size : 14:2;20:9
			line-width : 1
		draw : shape

	target : power_line
		define
			min-zoom: 16
			line-width: 1
			line-color : #5c5c5c white 50%
		for : power=line
			define
				line-color : #5c5c5c
				min-zoom : 14
				line-width: 1
		draw : line

	target:aerialway *
		define
			min-zoom:12
			line-width:1
			line-style:solid
			line-color:#999
		draw:line
		draw:text
	target:aerialway closed
		define
			min-zoom:12
			shape:circle
			shape-size:1
			shape-spacing:20
		draw:shape
	target:aerialway open
		define
			min-zoom:12
			shape:custom
			shape-def:l:0,1,0,-1
			shape-spacing:5
			shape-size:3
			line-width:1
		draw:shape
	target : platform
		define
			min-zoom : 13
			line-color : gray
			line-width : 3
		draw : line
	target : railway rail
		define
			min-zoom : 13
			line-style : dashlong
			line-color : white
			line-width : 2
			border-style : solid
			border-color : gray
			border-width : 25%
		draw : line
		define
			min-zoom : 6
			max-zoom : 13
			line-style : none
			line-color : white black 30%
			line-width : 6:1;8:1;12:1.5
		draw : line
	target : railway*
		define
			min-zoom : 13
			line-color : gray
			line-width : 2
		draw : line
		define
			min-zoom : 15
			text-align-horizontal : center
			text-align-vertical : center
		//draw:text

	target : highway access*
		define
			min-zoom : 13
			line-width : 13:1;15:2;18:4
			//line-style : dash
			//line-color : #F7D4D4
			line-color : #CCCCCC
		for : access=destination
			define
				//line-color : lightblue white 50%
		draw : line

	target : highway construction
		define
			min-zoom : 13
			line-width : 13:2;15:4;18:10
			//line-style : dot
			//line-color : yellow
		for : construction=tertiary OR construction=secondary OR construction=primary
			define
				//line-color : white
		draw : line

	target : motorway_junction
		define
			font-size : 11
			min-zoom : 13
			text-color : #849BBD
			text-halo-width : 25%
			text-offset-vertical : 150%
		draw: text

	target : highway*
		define
			font-size : 15:7;18:10
			font-weight : bold
			line-color : #CCCCCC

		for : oneway=yes OR oneway=true
			define
				min-zoom : 15
				shape : custom
				shape-def : 60,0,20,-40,20,-15,-60,-15,-60,15,20,15,20,40;Z
				shape-size : 12
				shape-aspect : 0.75
				shape-spacing : 6
				fill-color : #EEEFFF
				line-style : none
			for : oneway=-1
				define
					angle : 180
			draw : shape

		define
			line-style : solid
			line-join : round
			line-start-cap : round
			line-end-cap : round

		if : *motorway*
			if : *link
				define
					line-width : 7:1;12:3;13:4;16:5;18:6
			else
				define
					line-width : 7:1;9:2;12:3;13:7;16:10;18:12
			define
				min-zoom : 12
				//line-color : #849BBD
				border-style : none
				border-color : #849BBD black 20%
				border-width : 15%
			draw : line
			define
				min-zoom : 7
				max-zoom : 12
				border-style : none
			draw : line
			define
				min-zoom : 10
				max-zoom : 20
				font-family : AlegreyaSans-Medium
				text-align-horizontal : center
				text-align-vertical : center
				text : ref
				font-size : 12
				text-color : #fcfcfb
				text-halo-width : 0
				shape : custom
				shape-def : p:#809bc0;pw:5;f:#809bc0;m:-10,-10;l:10,-10;a:10,10,10,10;l:-10,10;a:10,10,-10,-10;z;p:#fcfcfb;pw:2;m:-10,-10;l:10,-10;a:10,10,10,10;l:-10,10;a:10,10,-10,-10;z
				shield-padding-left : 5
				shield-padding-right : 5
				shield-padding-top : 7
				shield-padding-bottom : 7
				shield-resize-mode : free
			//draw : shield
		elseif : *trunk*
			define
				min-zoom : 12
				//line-color : #96D296
				line-width : 11:1;13:2;15:10;18:12
				border-style : none
				border-color : #96D296 black 20%
				border-width : 15%
			for : tunnel=yes
				define
					border-style : dot
			draw : line
			define
				min-zoom : 7
				max-zoom : 12
				border-style : none
			draw : line
		elseif : *primary*
			define
				min-zoom : 11
				//line-color : #ECA2A3
				line-width : 11:2;12:2;15:10;18:12
				border-style : none
				border-color : #ECA2A3 black 20%
				border-width : 15%
			for : tunnel=yes
				define
					border-style : dot
			draw : line
			define
				min-zoom : 7
				max-zoom : 11
				border-style : none
			draw : line
			define
				min-zoom : 13
				max-zoom : 20
			draw : text
		elseif : *secondary
			define
				min-zoom : 12
				//line-color : #FDD6A4
				line-width : 10:1;11:2;13:2;15:10;18:12
				border-style : none
				border-color : #CAA36F
				border-width : 5%
			for : tunnel=yes
				define
					border-style : dot
			for : bridge=yes
				define
					border-color : #000
					border-width : 8%
			draw : line
			define
				min-zoom : 8.5
				max-zoom : 12
				border-style : none
			draw : line
			define
				min-zoom : 13
				max-zoom : 20
			draw : text
		elseif : *tertiary
			define
				min-zoom : 13
				//line-color : #FEFEB2
				line-width : 10:1;13:2;15:10;18:12
				border-style : none
				border-color : #FEFEB2 black 20%
				border-width : 15%
			for : tunnel=yes
				define
					border-style : dot
			for : bridge=yes
				define
					border-color : #000
			draw : line
			define
				min-zoom : 10
				max-zoom : 13
				line-color : white black 25%
				border-style : none
			draw : line
			define
				min-zoom : 15
				max-zoom : 20
			draw : text
		elseif : *service
			define
				min-zoom : 13
				//line-color : magenta
				line-width : 12:0.5;13:1;15:3;18:5
				border-style : none
				border-color : #FEFEB2 black 20%
				border-width : 15%
			for : tunnel=yes
				define
					border-style : dot
			for : bridge=yes
				define
					border-color : #000
			draw : line
			draw : text
		elseif : *pedestrian
			for : not area
				define
					min-zoom : 13
					line-color : #EDEDED
					line-width : 7:0.6;9:1;10:1.2;12:2.5;13:3;16:5;18:6
					border-style : none
					border-color : #B1B1B1 black 20%
					border-width : 15%
				for : tunnel=yes
					define
						border-style : dot
				for : bridge=yes
					define
						border-color : #000
				draw : line
				draw : text

		elseif : $regex("(.*residential)|(.*unclassified)")
			define
				min-zoom : 13
				//line-color : white
				line-width : 12:1;13:1.5;15:6;18:15
				border-style : none
				border-color : white black 25%
				border-width : 15%
			for : tunnel=yes
				define
					border-style : dot
			for : bridge=yes
				define
					border-color : #000
			draw : line
			define
				min-zoom : 10
				max-zoom : 13
				border-style : none
				//line-color : white black 25%
			draw : line
			define
				min-zoom : 15
				max-zoom : 20
			draw : text
		elseif : *living_street
			define
				min-zoom : 13
				//line-color : white black 25%
				//line-color: magenta
				line-width : 12:1;13:1.5;15:6;18:15
				border-style : none
			for : tunnel=yes
				define
					border-style : dot
			for : bridge=yes
				define
					border-color : #000
			draw : line
			define
				min-zoom : 15
				max-zoom : 20
			draw : text
		elseif : *track
			define
				min-zoom : 12.5
				//line-color : #9D7517
				line-width : 12.5:0.3;13:0.5;15:1;18:1.5
				line-style : dash
				border-style : solid
				border-color : white
				border-width : 100%
				border-opacity : 0.3
			for : tracktype=grade1
				define
					line-style : solid
					line-width : 12.5:0.5;13:1;15:1.5;18:2
			for : tracktype=grade2
				define
					line-style: dashlong
			for : tracktype=grade3
				define
					line-style: dash
			for : tracktype=grade4
				define
					line-style: dashdot
			for : tracktype=grade5
				define
					line-style: dashdotdot
			for : tunnel=yes
				define
					border-style : dot
			for : bridge=yes
				define
					border-color : #000
			draw : line
			draw : text
		elseif : *footway
			define
				min-zoom : 13
				//line-color : #F68474
				line-color: #dddddd
				line-width : 13:0.5;15:1;18:1.5
				line-style : dot
				border-style : solid
				border-color : white
				border-width : 100%
				border-opacity : 0.3
			for : tunnel=yes
				define
					border-style : dot
			for : bridge=yes
				define
					border-color : #000
			draw : line
			draw : text
		elseif : *cycleway
			define
				min-zoom : 13
				line-color : #dddddd
				line-width : 13:0.5;15:1;18:1.5
				line-style : dot
				border-style : solid
				border-color : white
				border-width : 100%
				border-opacity : 0.3
			for : tunnel=yes
				define
					border-style : dot
			for : bridge=yes
				define
					border-color : #000
					border-opacity : 1
			draw : line
			draw : text
		elseif : *path
			define
				min-zoom : 13
				//line-color : #6E7C6D
				line-width : 13:0.5;15:1;18:1.5
				line-style : dash
				border-style : solid
				border-color : white
				border-width : 100%
				border-opacity : 0.3
			for : tunnel=yes
				define
					border-style : dot
			for : bridge=yes
				define
					border-color : #000
			draw : line
			draw : text
		else
			stop

	target : highway steps
		define
			min-zoom : 16
			shape : custom
			shape-def : -1,1, -1,-1, 1,-1, 1,1;Z
			shape-spacing : 2
			shape-size : 16:1;20:3
			shape-aspect : 3
			fill-color : #aaaaaa
			line-style : none
		draw : shape
	target : pier
		define
			//line-color : #F1EEE8
			line-width : 1:1;20:8
		draw : line

	target : line barrier
		define
			min-zoom : 13
			line-color : #333333
			line-width : 0.5
		for:barrier=fence
			define
				min-zoom:16
				line-color : #ffffcc
		draw : line

	target : bridge foot
		define
			min-zoom : 13
			line-color : white
			line-width : 7:0.6;9:1;10:1.2;12:2.5;13:3;16:5;18:6
			border-style : solid
			border-color : #FEFEB2 black 20%
			border-width : 15%
		draw : line
		draw : text

	target : historic citywalls
		define
			min-zoom : 13
			line-color : #8D968D
			line-width : 7:0.6;9:1;10:1.2;12:2.5;13:3;16:10
		draw : line
		draw : text

		define

	target : river
		define
			line-color : #C8E6E6
			line-width : 7:1;12:2;14:5
		draw : line
		define
			min-zoom:13
			font-size:13:8;16:12
			text-color:#B5D0D0
			font-weight:normal
		draw:text
	target : stream
		define
			line-color : #C8E6E6
			line-width : 13:1;15:2
		draw : line
		define
			min-zoom:13
			font-size:13:8;16:12
			text-color:#B5D0D0
			font-weight:normal
		draw:text

	target : canal
		define
			min-zoom : 12
			line-color : #C8E6E6
			line-width : 12:1;17:8
		draw : line
		define
			min-zoom:13
			font-size:13:8;16:12
			text-color:#B5D0D0
			font-weight:normal
		draw:text

	target : drain
		define
			min-zoom : 13
			line-color : #C8E6E6
			line-width : 1
		draw : line

	target: parking
		define
			icon-image : icons/SJJB/png/transport_parking.p.32.png
			min-zoom : 15
			icon-width : 6
		draw : icon
	target: bus stop
		define
			icon-image : icons/SJJB/png/transport_bus_stop.p.32.png
			min-zoom : 15
			icon-width : 15:6;18:8
		draw : icon
	target: railway station
		define
			min-zoom : 12
			shape : square
			//line-color : #7981B0
			line-color : #333333
//			fill-color : #7981B0
			fill-color : white
			shape-size : 12:5;18:8
		draw : shape
		define
			min-zoom : 14
//			font-size : 12
//			text-color : #7981B0
//			text-offset-vertical : -150%
		draw : text
	target: postbox
		define
			icon-image : icons/SJJB/png/amenity_post_box.p.32.png
			min-zoom : 16
			icon-width : 6
		//draw : icon
	target: postoffice
		define
			icon-image : icons/SJJB/png/amenity_post_office.p.32.png
			min-zoom : 16
			icon-width : 8
		draw : icon
	target: telephone
		define
			icon-image : icons/SJJB/png/amenity_telephone.p.32.png
			min-zoom : 16
			icon-width : 6
		//draw : icon

	target: fire station
		define
			icon-image : icons/SJJB/png/amenity_firestation.p.32.png
			min-zoom : 16
			icon-width : 8
		draw : icon
	target: hospital
		define
			icon-image : icons/SJJB/png/health_hospital.p.32.png
			min-zoom : 15
			icon-width : 8
		draw : icon
		define
			min-zoom : 16
			text-offset-vertical : 150%
			text-color : #DA0092
		draw : text
	target: police station
		define
			icon-image : icons/SJJB/png/amenity_police.p.32.png
			min-zoom : 16
			icon-width : 8
		draw : icon
	target: cafe
		define
			icon-image : icons/SJJB/png/food_cafe.p.32.png
			min-zoom : 16
			icon-width : 8
		draw : icon
	target: recycling
		define
			icon-image : icons/SJJB/png/amenity_recycling.p.32.png
			min-zoom : 16
			icon-width : 6
		draw : icon
	target: supermarket
		define
			icon-image : icons/SJJB/png/shopping_supermarket.p.32.png
			min-zoom : 16
			icon-width : 8
		draw : icon
	target: diy
		define
			icon-image : icons/SJJB/png/shopping_diy.p.32.png
			min-zoom : 16
			icon-width : 8
		draw : icon
	target: convenience
		define
			icon-image : icons/SJJB/png/shopping_convenience.p.32.png
			min-zoom : 16
			icon-width : 8
		draw : icon

	target: mini roundabout
		define
			icon-image : icons/SJJB/png/transport_roundabout_anticlockwise.p.32.png
			min-zoom : 16
			icon-width : 9
		draw : icon
	target: church
		define
			icon-image : icons/SJJB/png/place_of_worship_christian3.p.32.png
			min-zoom : 16
			icon-width : 8
		define
			text-offset-vertical : 150%
		draw : text
		draw : icon
	target: drinking water
		define
			icon-image : icons/SJJB/png/food_drinkingtap.p.32.png
			min-zoom : 16
			icon-width : 6
		draw : icon
	target: bank
		define
			min-zoom : 17
			text-color : #000000
			text-offset-vertical : 150%
		draw : text
		define
			icon-image : icons/SJJB/png/money_bank2.p.32.png
			min-zoom : 16
			icon-width : 8
		draw : icon
	target: atm
		define
			min-zoom : 17
			text-color : #000000
			text-offset-vertical : 150%
		draw : text
		define
			icon-image : icons/SJJB/png/money_atm2.p.32.png
			min-zoom : 16
			icon-width : 8
		draw : icon
	target: restaurant
		define
			min-zoom : 17
			text-color : #734a08
			text-offset-vertical : 150%
			font-size : 10
		//draw : text
		define
			icon-image : icons/SJJB/png/food_restaurant.p.32.png
			min-zoom : 16
			icon-width : 8
		draw : icon
	target: hair dresser
		define
			icon-image : icons/SJJB/png/shopping_hairdresser.p.32.png
			min-zoom : 16
			icon-width : 8
		draw : icon

	target: toilets
		define
			icon-image : icons/SJJB/png/amenity_toilets.p.32.png
			min-zoom : 16
			icon-width : 6
		draw : icon
	target: pharmacy
		define
			icon-image : icons/SJJB/png/health_pharmacy.p.32.png
			min-zoom : 16
			icon-width : 8
		draw : icon
	target: library
		define
			icon-image : icons/SJJB/png/amenity_library.p.32.png
			min-zoom : 16
			icon-width : 8
		draw : icon
	target: bakery
		define
			min-zoom : 17
			text-color : #2B80FE
			text-offset-vertical : 150%
		//draw : text
		define
			icon-image : icons/SJJB/png/shopping_bakery.p.32.png
			min-zoom : 16
			icon-width : 8
		draw : icon
		define
			min-zoom : 17
			text-color : #AA33AA
			text-offset-vertical : 150%
			font-size : 10
		//draw : text
	target: tree
		define
			icon-image : http://svn.openstreetmap.org/applications/rendering/mapnik/symbols/tree2.png
			min-zoom : 16
			icon-width : 6
		//draw : icon
	target: memorial
		define
			icon-image : icons/SJJB/png/tourist_memorial.p.32.png
			min-zoom : 16
			icon-width : 8
		//draw : icon
	target: school
		define
			icon-image : icons/SJJB/png/education_school.p.32.png
			min-zoom : 16
			icon-width : 8
		draw : icon
		define
			text-offset-vertical : 150%
		draw : text
	target : puffin
		define
			icon-image : icons/SJJB/png/transport_traffic_lights.p.32.png
			min-zoom : 16
			icon-width : 8
		draw : icon

	target : gate
		define
			icon-image : icons/SJJB/png/barrier_gate.p.32.png
			min-zoom : 16
			icon-width : 7
		draw : icon

	target : tourism*
		define
			min-zoom : 17
			text-color : #2B80FE
			text-offset-vertical : 150%
		draw : text
		if : *hotel
			define
				icon-image : icons/SJJB/png/accommodation_hotel2.p.32.png
				min-zoom : 16
				icon-width : 8

		elseif : *viewpoint
			define
				icon-image : icons/SJJB/png/tourist_view_point.p.32.png
				min-zoom : 16
				icon-width : 8

		elseif : *museum
			define
				icon-image : icons/SJJB/png/tourist_museum.p.32.png
				min-zoom : 16
				icon-width : 8
			draw : text
		else
			stop
		draw : icon

	target : amenity*
		define
			min-zoom : 17
			text-color : #856951
			text-offset-vertical : 150%
		draw : text

		define
			min-zoom : 16
			icon-width : 8
		if : *pub
			define
				icon-image : icons/SJJB/png/food_pub.p.32.png
		elseif : *fast_food
			define
				icon-image : icons/SJJB/png/food_fastfood2.p.32.png
		else
			stop
		draw : icon


	target: contour*
		define
			line-color : #7f3300
			line-opacity : 0.35
			curved : true
		if : *major
			define
				map.rendering.contour.label : true
				min-zoom : 9
				line-width : 11:0.1;11.9:1;12:2
				font-size : 10
				font-style : italic
				font-weight : normal
				text-halo-width : 35%
				text-halo-opacity : 1
				text-halo-color : #F1EEE8
		else
			define
				min-zoom : 12
				line-width : 1
		draw : contour

	target: coastline
		define
			line-color : #B5D0D0
			line-width : 2
		draw : line

[-- Attachment #3: Type: text/plain, Size: 3 bytes --]





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Re: mp-geo Metapost package with ConTeXt

[Arthur Rosendahl]

On Sat, Jul 17, 2021 at 12:53:33PM +0200, Hans Hagen wrote:
> Just as an example, the context meeting is att the attached location:
> 
>   50°45’7” / 5°35’19”
> 
> https://www.openstreetmap.org/export#map=18/50.75175/5.58883

  If you want official data you can try the Belgian cadastre:
https://data.gov.be/en/dataset/tt098dcb-f5c7-49b8-8e0b-7c3811630d85 :-)

	Best,

		Arthur
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Re: mp-geo Metapost package with ConTeXt

[Hans Hagen]

On 7/17/2021 2:42 PM, Arthur Rosendahl wrote:
> On Sat, Jul 17, 2021 at 12:53:33PM +0200, Hans Hagen wrote:
>> Just as an example, the context meeting is att the attached location:
>>
>>    50°45’7” / 5°35’19”
>>
>> https://www.openstreetmap.org/export#map=18/50.75175/5.58883
> 
>    If you want official data you can try the Belgian cadastre:
> https://data.gov.be/en/dataset/tt098dcb-f5c7-49b8-8e0b-7c3811630d85 :-)
Yet another format? No way. I managed to go big so for instance the area 
where the colorado user group is located:

   https://www.openstreetmap.org/export#map=12/40.5117/-104.9496

produces a 122 MB osm file

   https://overpass-api.de/api/map?bbox=-105.1817,40.4096,-104.9493,40.6272

that gets turned into a 15 MB metapost file that becomes an 8.7 MB pdf 
file. Unfortunately it takes 36 seconds to be produced (9 seconds xml 
loading, 17 seconds map processing, 3 seconds mp -- which is not that 
bad -- and some 2.56 seconds pdf production) plus some 3 GB memory but 
that's still under my limit. Maybe a decent modern desktop can do it in 
half that time, who knows.

Of course the rather detailed colorfull image is a challenge for the pdf 
viewer but (sumatra) it manages and one can then zoom in a lot. I tried 
the whole of slovenia to prove myself to mojca but overran my quota for 
that api (and I'm not in the mood to install all kind of stuff here).

Hans

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Re: mp-geo Metapost package with ConTeXt

[Henning Hraban Ramm]

> Am 17.07.2021 um 20:50 schrieb Hans Hagen <j.hagen@xs4all.nl>:
> 
> On 7/17/2021 2:42 PM, Arthur Rosendahl wrote:
>> On Sat, Jul 17, 2021 at 12:53:33PM +0200, Hans Hagen wrote:
>>> Just as an example, the context meeting is att the attached location:
>>> 
>>>   50°45’7” / 5°35’19”
>>> 
>>> https://www.openstreetmap.org/export#map=18/50.75175/5.58883
>>   If you want official data you can try the Belgian cadastre:
>> https://data.gov.be/en/dataset/tt098dcb-f5c7-49b8-8e0b-7c3811630d85 :-)
> Yet another format? No way. I managed to go big so for instance the area where the colorado user group is located:
> 
>  https://www.openstreetmap.org/export#map=12/40.5117/-104.9496
> 
> produces a 122 MB osm file
> 
>  https://overpass-api.de/api/map?bbox=-105.1817,40.4096,-104.9493,40.6272
> 
> that gets turned into a 15 MB metapost file that becomes an 8.7 MB pdf file. Unfortunately it takes 36 seconds to be produced (9 seconds xml loading, 17 seconds map processing, 3 seconds mp -- which is not that bad -- and some 2.56 seconds pdf production) plus some 3 GB memory but that's still under my limit. Maybe a decent modern desktop can do it in half that time, who knows.
> 
> Of course the rather detailed colorfull image is a challenge for the pdf viewer but (sumatra) it manages and one can then zoom in a lot. I tried the whole of slovenia to prove myself to mojca but overran my quota for that api (and I'm not in the mood to install all kind of stuff here).

I downloaded a few countries for you:
https://sedna.fiee.net/d/328d53f6a3e04b23aee2/

Hraban
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Re: mp-geo Metapost package with ConTeXt

[Gavin via ntg-context]

Hi everyone,

I’ve made great progress creating globes for my diagrams using the data in the mp-geo package and some ideas from Hans. I have a couple questions about moving information from Lua to MetaPost. Below is a MWE for illustration. I have two related questions:

1) Is there a way for MetaPost to grab information from a Lua table? Currently the MetaPost code calls a Lua function which has a single line returning the information from the table. Is this necessary, or is these something in MetaPost that can get a path or color from a Lua table? 

2) While I’m having good luck with paths, colors are causing trouble. In the data set the color information is in strings with French names of the color, like “rouge.” If I hand this string to MetaPost, MetaPost doesn’t expand it into a color. It does work if it is a native color, like “red,” but not if it is a defined color and not if the color is in a Lua variable. Any suggestions?

Thanks!
Gavin


The code below produces four pie shape wedges to show the different results of handling the color. They should all be red, but the last two are black.


\startMPinclusions
  color rouge;		% To avoid changing the data files, I need to define colors in French.
  rouge=(1,0,0);	% For this MWE, I only define rouge.
  
  color mycolor;	% Defining mycolor in MetaPost works great, as shown in the first shape.
  mycolor = rouge;
\stopMPinclusions

\startluacode
  myluapath = {{0,0}, {1,0,0,0,1,0.25}, {0.8,0.6,0.95,0.4}, cycle = true}
  myluacolor = “red”	--% Data files are read by Lua, so the myluacolor will be a string (in French, but native colors don't work either).
  
  function mp.getpath()	--% Is there a way for the MetaPost code to grab the path directly from the table?
    mp.inject.path(myluapath)
  end
  
  function mp.getred() --% Returning a string work for native colors.
    mp.inject.string("red")
  end

  function mp.getrouge() --% Returning a string does not work for defined
    mp.inject.string("rouge")
  end

  function mp.getcolor() --% Putting the string in a variable does not work.
    mp.inject.string(mycolor)
  end
\stopluacode

\starttext
  \startMPpage
   fill lua.mp.getpath() scaled 2.5cm withcolor mycolor; % MetaPost color definition works great.
   fill lua.mp.getpath() scaled 2.5cm shifted (0, -2cm) withcolor lua.mp.getred(); % Returning a string work for native colors.
   fill lua.mp.getpath() scaled 2.5cm shifted (0, -4cm) withcolor lua.mp.getrouge(); % Returning a string does not work for defined colors.
   fill lua.mp.getpath() scaled 2.5cm shifted (0, -6cm) withcolor lua.mp.getcolor(); % Putting the string in a variable does not work.
  \stopMPpage
\stoptext
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Re: mp-geo Metapost package with ConTeXt

[Aditya Mahajan via ntg-context]

[-- Attachment #1: Type: text/plain, Size: 880 bytes --]

On Mon, 26 Jul 2021, Gavin via ntg-context wrote:

> 2) While I’m having good luck with paths, colors are causing trouble. In the data set the color information is in strings with French names of the color, like “rouge.” If I hand this string to MetaPost, MetaPost doesn’t expand it into a color. It does work if it is a native color, like “red,” but not if it is a defined color and not if the color is in a Lua variable. Any suggestions?

\definecolor[rouge][red] should work. A better option will be use color palettes. 

This is very old code, but will give an idea of how to use palettes:
https://github.com/adityam/visualcounter/blob/master/visualcounter.pdf Effectively all you need to do is add \setuppalet[name] at an appropriate place, and then the user can easily change the colors (rather than having them specified as part of data files).

Aditya

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Re: mp-geo Metapost package with ConTeXt

[Gavin via ntg-context]

Hi All,

Getting Closer I asked:

>> 2) While I’m having good luck with paths, colors are causing trouble. In the data set the color information is in strings with French names of the color, like “rouge.” If I hand this string to MetaPost, MetaPost doesn’t expand it into a color. It does work if it is a native color, like “red,” but not if it is a defined color and not if the color is in a Lua variable. Any suggestions?

Aditya suggested:

> \definecolor[rouge][red] should work. A better option will be use color palettes. 

This solves my problem of translating French colors into English, but not the problem of passing colors from Lua to MetaPost. If the string giving the color name is in a variable, it doesn’t go through. A path in a variable works.

I’ve reduced my MWE below – no French, no MPinclusions, no new colors. Both pie slices should be red, but one is black. Any ideas on getting the color “red” passed from Lua to MetaPost when mycolor=“red”?

Thanks!
Gavin


\startluacode
  mypath = {{0,0}, {2,0,0,0,2,0.5}, {1.6,1.2,1.9,0.8}, cycle = true}
  mycolor = “red”	--% Data files are read by Lua, so the color of each object will be a string, like "red".
  
  function mp.getpath()	--% Is there a way for the MetaPost code to grab the path directly from the table?
    mp.inject.path(mypath)
  end
  
  function mp.getred() --% Returning a string works.
    mp.inject.string("red")
  end

  function mp.getcolor() --% Putting the string in a variable does not work.
    mp.inject.string(mycolor)
  end
\stopluacode

\starttext
  \startMPpage
   fill lua.mp.getpath() scaled 2.5cm withcolor lua.mp.getred(); % Returning a string works.
   fill lua.mp.getpath() scaled 2.5cm shifted (0, -4cm) withcolor lua.mp.getcolor(); % Putting the string in a variable does not work.
  \stopMPpage
\stoptext
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Re: mp-geo Metapost package with ConTeXt

[Alan Braslau via ntg-context]

On 27/07/21 08:12, Gavin via ntg-context wrote:
> Hi All,
> 
> Getting Closer I asked:
> 
>>> 2) While I’m having good luck with paths, colors are causing trouble. In the data set the color information is in strings with French names of the color, like “rouge.” If I hand this string to MetaPost, MetaPost doesn’t expand it into a color. It does work if it is a native color, like “red,” but not if it is a defined color and not if the color is in a Lua variable. Any suggestions?
> 
> Aditya suggested:
> 
>> \definecolor[rouge][red] should work. A better option will be use color palettes.
> 
> This solves my problem of translating French colors into English, but not the problem of passing colors from Lua to MetaPost. If the string giving the color name is in a variable, it doesn’t go through. A path in a variable works.
> 
> I’ve reduced my MWE below – no French, no MPinclusions, no new colors. Both pie slices should be red, but one is black. Any ideas on getting the color “red” passed from Lua to MetaPost when mycolor=“red”?

I am not looking closely at the code, but in general we use

	fill fullcircle scaled 1cm withcolor red ;

and this takes Metapost's knowledge of red, the rgb triplet (1,0,0).
One can also use

	fill fullcircle scaled 1cm withcolor "red" ;

as a string (quotation) and this passes Context's definition of the color.

Alan



-- 
Alan
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Re: mp-geo Metapost package with ConTeXt

[Henning Hraban Ramm via ntg-context]

> Am 17.07.2021 um 12:45 schrieb Hans Hagen <j.hagen@xs4all.nl>:
> 
> 
> \startMPpage
>    draw lmt_openstreetmap [
>        filename = "hasselt.osm"
>        grid     = "dots",
>    ] ;
> \stopMPpage
> 
> The hasselt osm file is sime 12 MB, the colorful hasselt pdf file just below 1 MB so that's okay (3.7 sec processing time on my machine so if all claims are right sub seconds on a fast new apple).

I finally tried this, hoping to replace my Maperitive workflow.

With a Bonn map from https://download.bbbike.org/osm/bbbike/ of 724 MB I started it last night (~13 h before), and it still didn’t finish. No messages after:

openstreetmap   > processing file '/Users/hraban/Downloads/ConTeXt/Bonn.osm'
openstreetmap   > original size 713811948 bytes, stripped down to 603309215 bytes


Maybe I should try smaller files ;)


Hraban
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Re: mp-geo Metapost package with ConTeXt

[Hans Hagen via ntg-context]

On 10/22/2021 11:31 AM, Henning Hraban Ramm via ntg-context wrote:
> 
>> Am 17.07.2021 um 12:45 schrieb Hans Hagen <j.hagen@xs4all.nl>:
>>
>>
>> \startMPpage
>>     draw lmt_openstreetmap [
>>         filename = "hasselt.osm"
>>         grid     = "dots",
>>     ] ;
>> \stopMPpage
>>
>> The hasselt osm file is sime 12 MB, the colorful hasselt pdf file just below 1 MB so that's okay (3.7 sec processing time on my machine so if all claims are right sub seconds on a fast new apple).
> 
> I finally tried this, hoping to replace my Maperitive workflow.
> 
> With a Bonn map from https://download.bbbike.org/osm/bbbike/ of 724 MB I started it last night (~13 h before), and it still didn’t finish. No messages after:
> 
> openstreetmap   > processing file '/Users/hraban/Downloads/ConTeXt/Bonn.osm'
> openstreetmap   > original size 713811948 bytes, stripped down to 603309215 bytes
> 
> Maybe I should try smaller files ;)

We hit a limti in lpeg that allocates memory by duplicating the size 
which then hits a top and falls back in allocating by + 1 every capture 
which then kind of stalls the xml interpretation. I can hack that to 
work (and need to check that with every lpeg update), but as we enter a 
next stage in th econversion mem starts going virtual anyway and I see 
my SSD being tortured so I aborted. More testing has to wait till I (if 
ever) have a faster machine, with (say) 64GB super fast memory.

On my machine the still ok size is some 200MB.

Hans

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               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
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Re: mp-geo Metapost package with ConTeXt

[Henning Hraban Ramm via ntg-context]

> Am 22.10.2021 um 11:31 schrieb Henning Hraban Ramm via ntg-context <ntg-context@ntg.nl>:
> 
> 
>> Am 17.07.2021 um 12:45 schrieb Hans Hagen <j.hagen@xs4all.nl>:
>> 
>> 
>> \startMPpage
>>   draw lmt_openstreetmap [
>>       filename = "hasselt.osm"
>>       grid     = "dots",
>>   ] ;
>> \stopMPpage
>> 
>> The hasselt osm file is sime 12 MB, the colorful hasselt pdf file just below 1 MB so that's okay (3.7 sec processing time on my machine so if all claims are right sub seconds on a fast new apple).
> 
> I finally tried this, hoping to replace my Maperitive workflow.
> 
> With a Bonn map from https://download.bbbike.org/osm/bbbike/ of 724 MB I started it last night (~13 h before), and it still didn’t finish. No messages after:
> 
> openstreetmap   > processing file '/Users/hraban/Downloads/ConTeXt/Bonn.osm'
> openstreetmap   > original size 713811948 bytes, stripped down to 603309215 bytes
> 
> 
> Maybe I should try smaller files ;)

Indeed:

openstreetmap   > processing file '/Users/hraban/Downloads/ConTeXt/Limburg.osm'
openstreetmap   > original size 12431810 bytes, stripped down to 8768209 bytes
openstreetmap   > xml data loaded
openstreetmap   > 859154 characters metapost code, preprocessing time 3.165 seconds
...
pdfview         | command: open "osm-test.pdf" 1>/dev/null 2>/dev/null &
mtx-context     | pdfview overhead: 0.005 seconds
system          | total runtime: 9.211 seconds of 9.328 seconds

The PDF is 488 kB.


Redefining color works, if you know what you’re looking for – and it’s partly really strange what is marked how...
Seems like I should start to work on OSM again.

Are there any plans for text labels, e.g. street names? (I guess these are really tricky.)

Hraban
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Re: mp-geo Metapost package with ConTeXt

[Hans Hagen via ntg-context]

On 10/22/2021 4:16 PM, Henning Hraban Ramm via ntg-context wrote:
> 
>> Am 22.10.2021 um 11:31 schrieb Henning Hraban Ramm via ntg-context <ntg-context@ntg.nl>:
>>
>>
>>> Am 17.07.2021 um 12:45 schrieb Hans Hagen <j.hagen@xs4all.nl>:
>>>
>>>
>>> \startMPpage
>>>    draw lmt_openstreetmap [
>>>        filename = "hasselt.osm"
>>>        grid     = "dots",
>>>    ] ;
>>> \stopMPpage
>>>
>>> The hasselt osm file is sime 12 MB, the colorful hasselt pdf file just below 1 MB so that's okay (3.7 sec processing time on my machine so if all claims are right sub seconds on a fast new apple).
>>
>> I finally tried this, hoping to replace my Maperitive workflow.
>>
>> With a Bonn map from https://download.bbbike.org/osm/bbbike/ of 724 MB I started it last night (~13 h before), and it still didn’t finish. No messages after:
>>
>> openstreetmap   > processing file '/Users/hraban/Downloads/ConTeXt/Bonn.osm'
>> openstreetmap   > original size 713811948 bytes, stripped down to 603309215 bytes
>>
>>
>> Maybe I should try smaller files ;)
> 
> Indeed:
> 
> openstreetmap   > processing file '/Users/hraban/Downloads/ConTeXt/Limburg.osm'
> openstreetmap   > original size 12431810 bytes, stripped down to 8768209 bytes
> openstreetmap   > xml data loaded
> openstreetmap   > 859154 characters metapost code, preprocessing time 3.165 seconds
> ...
> pdfview         | command: open "osm-test.pdf" 1>/dev/null 2>/dev/null &
> mtx-context     | pdfview overhead: 0.005 seconds
> system          | total runtime: 9.211 seconds of 9.328 seconds
> 
> The PDF is 488 kB.
> 
> 
> Redefining color works, if you know what you’re looking for – and it’s partly really strange what is marked how...
> Seems like I should start to work on OSM again.

yes, and we need to add more heuristics (i already added some after 
rendering don knuths university site (apart from the many fast food 
venue research institutes are also marked 'interestingly')

> Are there any plans for text labels, e.g. street names? (I guess these are really tricky.)
depends on how

Hans

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               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
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