These files are needed to extend online map providers in Locus Maps. providers.xml is the essential one. Icons are just for decoration.
Copy the file "providers.xml" (find it in this repo) and all icons into the directory:
"...\Locus\mapsOnline\custom"
Go to Google Play, install and run Locus Map Tweak:
https://play.google.com/store/apps/details?id=com.mjk.locusmaptweak
Find or fix maps with this method:
http://docs.locusmap.eu/doku.php?id=manual:advanced:customization:online_maps
Google+ Page:
https://plus.google.com/105415797711448238292/