Hi!

Just wanted to let you know that `surface=gravel` in OSM sense usually means "dense larger rocks". Roads like that in Latvia are actually very rare. Typical unpaved rural and remote roads (so-called "grunts" ceļi/"grantenes") are almost always `surface=compacted` - https://wiki.openstreetmap.org/wiki/Tag:surface%3Dcompacted . It's not completely incorrect to tag it this way, but it does make surface values poorly usable for cases where it matters, like bicycles/wheelchairs/etc.

"Real" gravel roads look like this: https://www.mapillary.com/app/?pKey=795381835143910&focus=photo

Thanks