Talk:Tag:hazard=landslide

I wanted to start a discussion here based on the works of jmbangate for mapping landslide areas in the Philippines based on maxar imagery in 2014. His data gives clues to risk areas, landslide prone areas and as such deleting landslides not visible on maxar today in 2023 is maybe a bad idea. As the data indicates which areas are at a higher risk and which at a lower risk. Also a lot of landslides may not actually be gone - you just don't see them anymore - but the underlying physical reality is still there. His contributions are "nodes" and not areas. Sadly the natural=landslide only allows areas to be mapped, not nodes - and quite often nodes is the best and most accurate we can get from sat imagery as this is in some areas of the planet rather poor quality. Yet the hazard=landslide allows just that, nodes.

Therefore the use of hazard=landslide is actually very accurate for hikers, bikers, governments, and researchers and thus why I want to focus on that one here. Yet in the existing wiki it refers only to traffic signs - I see no reason why it should be limited to that. hazard=landslide is also perfectly suited to map just the point where a landslide occurred, when it happened or surveyed and the current status of that landslide.
as such I propose a status tag for the actual landslide and not the road sign

landslide:status=*
The possible options here could be:
- visible
- eroded
- overgrown
- not visible
- old scarp
- removed (human interaction - whatever the human built here)

Furthermore for detailed mapping (not into that myself but for future use of his research project) he suggested one could map parts if not the whole landslide is visible anymore landslide:part=*
- toe
- main_body
- crown

Furthermore I'd propose the use of landslide=natural to point out the difference between the road sign hazard and the actual natural physical reality on the ground of the landslide

The hazard=landslide itself should be used in correlation with traffic_sign as mentioned already on the wiki, so this is just an extension of the use of this tagging for the actual landslides themselves additionally to the traffic_sign hazard

PS - I'm totally open to the idea of using the natural=landslide for this instead - and thus extend that tag to single nodes only instead of area only.Hike&Map (talk) 20:59, 3 May 2023 (UTC)

I'd like to add here, the main https://wiki.openstreetmap.org/wiki/Key:hazard page lists explicitly the use of this tag not just for traffic signs, as the hazard=landslide semi-does, but also for actually mapping the hazard itself.