[Talk-us] US National Hydrography Dataset

Dave Hansen dave at sr71.net
Mon Jan 28 20:17:58 GMT 2008


On Mon, 2008-01-28 at 12:11 -0800, Matthew Perry wrote:
> For my corner of the world (southern california, santa barbara) the
> data is pretty darn good: http://perrygeo.net/tmp/nhd.osm.tar.gz

Yep.  It looks quite good.  One thing you probably want to be careful
about is overlapping ways.  For instance, way_ids 27714581 and 27719337
appear over each other.  Is that intentional?

You might also want to look into updating the JOSM validator to stop
throwing "overlapping ways" errors on things when areas like 27713919
and 27713929 share a bunch of segments because they have a common
border.

-- Dave





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