OSM files are not supported in RadMap. You can search for a possible ways to convert OSM data to shapefiles (e.g. take a look at this post
) and use them in the map.
I hope this information helps.
Telerik by Progress
Want to extend the target reach of your WPF applications, leveraging iOS, Android, and UWP? Try UI for Xamarin
, a suite of polished and feature-rich components for the Xamarin framework, which allow you to write beautiful native mobile apps using a single shared C# codebase.