Oruxmaps Online Map Sources.xml ((top)) -

folder to prevent your changes from being overwritten during app updates. Primary (Custom): oruxmaps/mapfiles/customonlinemaps/ (Safest location for personalized files). oruxmaps/mapfiles/ (Contains the default list of maps provided by the app). Note for Android 11+: Due to "Scoped Storage" rules, the path might be deeper:

: Defines the available zoom levels for that specific source. MERCATORESFERICA for standard web maps. : A boolean ( Oruxmaps Online Map Sources.xml

Inside the XML, each map source is a <onlinemapsource> container. Here’s a real (simplified) example for a topographic map: folder to prevent your changes from being overwritten