I created these very VERY basic python codes which takes CSV files of coordinates and then converts them to geojson file to represent points and lines in @Skipper's YS.qRadar.
I know it's primitive, but the workflow is to collect the coordinates (from the radar itself you can see the coordinates in the bottom of screen) in the form same as in the template csv. Then for points you can define name, for the lines you can define color. Then just run the script, and there you are, you can now import it.
There is a free software QGIS much more capable, but I found it good enough for my purposes, maybe you can use it too!
Cheers!
