How to convert SVG polygons and rectangles to geoJSON?

Question

JavaScript

Hello,
There is a simple floor plan editor - it is an SVG for the height \ width of the container, where the user can draw \ delete \ copy polygons and rectangles with the mouse. The floor plan itself is a base64 encoded image pasted into an SVG. All this works on d3 and looks something like this:

The customer wants all this stuff to be stored in geoJSON format. Question - how, what to use? I tried to google, read the d3 documentation - basically the reverse options are described everywhere, how geoJSON is converted to SVG. Moreover, complex three-dimensional projections are usually used, which I clearly do not need for a flat plan.
Am I not looking there? Or geoJSON is not relevant at all in this case? Suggest something.
Thanks a lot.

Answer 1

What are the problems? Get all the objects on the canvas with their coordinates and shape type, and convert them to the form
{

"type": "Polygon", 
    "coordinates": [
        
    ]
}

where coordinates describes the polygon vertex points.
Not so difficult. Read that one https://en.wikipedia.org/wiki/GeoJSON