I’ve tested this but it appears outside, not as an layer over the picture.

\startMPcode 
draw lmt_svg [
	filename = "steguppgift.svg",
	height = 5cm,
	width = 10cm,
	] ;
label(\sometxt{5,0m},(63.936298,129.563995));
label(\sometxt{37°},(95.652702,27.367201));	
\stopMPcode

Thanks 

/Janne
> 12 feb. 2020 kl. 20:10 skrev Hans Hagen <j.hagen@xs4all.nl>:
> 
> On 2/12/2020 6:01 PM, Jan-Erik Hägglöf wrote:
>> The expected output should be like this, see example in the link below
>> https://drive.google.com/file/d/13pCuUvNeL7T_Hs7-qrKZclkadcJ7_jVV/view?usp=sharing
>> So that I have a picture so I can change the label text inside according to different needs e.g change from 37° to 41° without reediting it in Inkscape.
>> A similar properties like latex export picture.pdf_tex which is a function in Inkscape
>> I investigate the details manual tip you provided, thanks a lot.
> you might want to peek into the luametafun manual as svg is discussed there, including label stuff
> 
> what you can also try (with lmtx) is this (no real interface yet):
> 
> \starttext
> 
> \hbox\bgroup
>  \ctxlua{metapost.startsvghashing()}%
>  \includesvgfile[labels-004.svg]%
>  \ctxlua{metapost.stopsvghashing()}%
> \egroup
> 
> \stoptext
> 
> which should turn your labels into tex, so you can typeset them as tex (so $\\sin(x)$ comes out as math) it's no big deal to add a remap option there but then i'd rather go for symbolic names
> 
> Hans
> 
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