I found that we can view USGS 3DEP data in the iD editor and I put instructions on the wiki: USGS 3D Elevation Program - OpenStreetMap Wiki
It shows cliff edges much better than satellite photos, which are often obscured by trees, offset/smeared because of the angle they were taken, etc.:
Before I go and adjust all the rock climbing areas, I just want to make sure:
- It’s OK to trace this data because USGS is public domain, right?
- This LIDAR data should always be more accurate than satellite images, right, so there should be no harm in adjusting cliffs to match the hillshade image?
- Cliff ways should follow the top edge of the cliff, and not the bottom edge?
- The part of the hillshade image that looks like the cliff edge is actually the cliff edge, right? The hillshade doesn’t mislead in some way?
Examples of what I would be doing:
8 posts - 4 participants
Ce sujet de discussion accompagne la publication sur https://community.openstreetmap.org/t/is-it-ok-to-adjust-cliffs-to-match-usgs-3dep/98910