I just updated an open-source set of shell scripts/map styles that generate maps that show dirt roads and tracks in a different color. I only have a Zumo XT and a BMW Nav V (that I only use with stock maps) so it's only tested on that but I thought I'd share since the methodology should be the same for other models.
https://github.com/markcushman/motomap
Using mkgmap and these scripts, I can highlight dirt roads on my Zumo XT (which I have mounted on a Triumph Scrambler 1200 XE) to let me "discover" the wonderful amount of drrrrt we have in North Georgia for year round riding (not trying to make anyone jealous!!).
Motomap (OSM maps for Adventure Riding)
Re: Motomap (OSM maps for Adventure Riding)
An update, I created https://motomap.org to host some pre-built maps for the US.
Also uploaded a YouTube video that will show you how to mark the surface of roads in OpenStreetMap which will in turn feed the motomap map coloring. https://www.youtube.com/watch?v=L6S9UUMdVdg
Also uploaded a YouTube video that will show you how to mark the surface of roads in OpenStreetMap which will in turn feed the motomap map coloring. https://www.youtube.com/watch?v=L6S9UUMdVdg