On Fri, Mar 10, 2017 at 2:04 PM, Mike Thompson <miketh...@gmail.com> wrote:
> On Fri, Mar 10, 2017 at 7:34 AM, Kevin Kenny <kevin.b.kenny+...@gmail.com> > wrote: > >> >> I can just now hear, nevertheless, a chorus asserting that the >> information is available by other means and therefore does not belong in >> OSM. An adit or a cave entrance (that isn't a sinkhole) pretty much has to >> go into a hillside, and a waterfall or a dam flows downhill, so with >> information about local topography, the direction can be determined. >> > In many parts of the world there may not be elevation data with an open > license of suitable resolution to make this determination for an adit. > Outside the band of 54° S to 60° N, you're certainly right about that. Within that band, the August 2015 NASA data set is in the public domain and has coverage at 30 m resolution horizontally. That's probably Not Quite Good Enough - I get spoilt by the 10 m coverage available for North America.
_______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
