In order to check in which country GPS coordinate is in, I've found this github repo, where there is GeoJSON file for each country.
I've loaded the files to geojson.io, and they seem very accurate.
However, when I'm loading them into to my application code, some of the GPS coordinates fails to resolve.
For example, GPS coordinate from Paris [2.356652, 48.845483] which I would expect to resolve to France. Looking at france.gsojson polygon coordinates I find they're in completely different scale, for example 722.5350952148436,51.10007257240614.
What am I missing here? How come the coordinates are completely different? and is there a way to convert one to another?
My code is written in Java and I'm using GeoTools libraries.