I also recommend StreetComplete (fdroid), an app that lets you contribute to the OpenStreetMaps database. It shows you a local map and asks questions like, how wide is this road? What kind of road is it? Is there a pedestrian crossing here? What kind of parking is here? How do power lines attach to this pole? etc.
I also recommend StreetComplete (fdroid), an app that lets you contribute to the OpenStreetMaps database. It shows you a local map and asks questions like, how wide is this road? What kind of road is it? Is there a pedestrian crossing here? What kind of parking is here? How do power lines attach to this pole? etc.