Recently, I had a task to convert an SVG image map into GeoJSON format for use in the GIS. This is a complicated thing to do because SVG vector images don't have spatial reference.
Fortunately, I stumbled on this NodeJS app package named svg2geojson written by Prognoz. This library converts an SVG image to a (slightly-incorrect) GeoJSON
To make use of this library, you need to update your SVG map by placing two 'GeoItems' inside a Prognoz MetaInfo element as a direct child of the '<svg>' element at the root of your document.
Now how do you find the X/Y and Longitude/Latitude attributes within the 'GeoItems' for your specific SVG image? This question is what I will attempt to answer in this blog post.
That is something like the daigram below:-
This for the basis of getting the X/Y coordinated from your SVG image space and the corresponding Longitude/Latitude coordinated from your GIS map.
Example: coming soon...
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