On Fri, 10 Mar 2017 09:34:51 -0500
Kevin Kenny <[email protected]> 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.

Thing is, the information *isn't* available by other means.  Adits
don't always go straight in -- of the two I'm aware of, both are at
rather sharp angles to the (very local) slope of the hill.

-- 
Mark

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