On Thursday 07 January 2016, Aaron Spaulding wrote: > Hi all, > > I’ve been working on generating 3D meshes based on OSM data and I ran > into a problem. Vertical features like 'natural=cliff', > 'barrier=retaining_wall’ and 'waterway=waterfall' occupy two points > in physical space, but because of the 2D nature of OSM its ambiguous > which side of the feature that the ‘ele’ tag applies.
For cliffs mapping conventions say that you should put the line on top of the cliff in case it is not exactly vertical - accordingly the ele tag would also refer to the top - but keep in mind that the elevation does not have to be constant. -- Christoph Hormann http://www.imagico.de/ _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
