On Fri, Mar 10, 2017 at 12:20 PM, Zecke <zecke@historic.place> wrote:
> Am 10.03.2017 20:04, schrieb Mike Thompson: > > > > 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. > > It's not true that an adit always enters the hill in slope direction. I > know of many adits entering at an angle. So this approach does not really > help. We decided to use a different symbol for adits without direction > information than for directed adits. > All the more reason to explicitly tag the direction of the opening.
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