OpenStreetMap
How do you handle streets and buildings that weren't originally underground, but now are? There appears to be a village near a faultline that suffers severely from this phenomenon ( http://www.environmentalgraffiti.com/featured/town-devoured-by-rock/10450 ). This one has me legitimately confused. I looked up this location hoping that I might find some interesting map renderings, but discover there's only a single road listed on OSM for that village!
Discussion
Comment from Minh Nguyen on 6 August 2009 at 06:18
The best I can come up with is adding
https://wiki.openstreetmap.org/wiki/Tag:tunnel=yeswherever the road dips into the cliffside, and maybehttps://wiki.openstreetmap.org/wiki/Tag:tunnel=yesandhttps://wiki.openstreetmap.org/wiki/Tag:area=yes(just in case) on any “covered” buildings. But I’m pretty sure none of the renderers do anything special with “tunnel buildings”.Comment from PhilippeP on 6 August 2009 at 07:53
Well from what I understand , the buidings were build directly inside the caves, the caves did not build around the houses ....
You can also add a maxheight tag for routing purposes but it does not qualify as a tunnel in my mind.
Comment from Skippern on 9 August 2009 at 08:15
Maybe layer=-1 or layer=-2 is the right way?