One of the biggest issues with routing in Germany generally using heatmap - so many trails and hard to tell what's paved and what isn't!
OSM sometimes has roadsurface data. You need to view it on the OSM website and query the map data itself but it can be quite useful.
@hamrack started
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One of the biggest issues with routing in Germany generally using heatmap - so many trails and hard to tell what's paved and what isn't!