On 18/07/2020 20:51, Joseph Eisenberg wrote:
It's perfectly reasonable to add surface=unpaved or similar based on aerial imagery alone, if you have some experience in distinguishing different surfaces of roads and tracks from aerial imagery.
I'd agree that most of the time telling "surface=unpaved" from a paved road or track is certainly possible. However, beyond that might be tricky.
As an example, here's one that I updated in OSM this morning. Have a look at https://www.openstreetmap.org/way/169902637 and follow that to the southwest. The surface changes a few times before it meets the next road. Do you believe that you would be able to infer those surface tags from imagery? I haven't added a tracktype there yet (lots of stuff in that area needs a resurvey!) and I'm sure you could say "it's definitely not tracktype=4 or 5" but I'd be reluctant to "overclaim" based on less-than-ideal sources.
Best Regards, Andy _______________________________________________ talk mailing list talk@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk
