[Talk-us] Low-quality NHD imports

Frederik Ramm frederik at remote.org
Fri Oct 13 06:06:30 UTC 2017


   there's a LOT of NHD:* (and nhd:*) tags on OSM objects, see


- 1.9 million NHD:FCode, but also 188k "NHD:Permanent_" (note the
underscore), 10k "NHD:WBAreaComI", or 1.5m "NHD:Resolution" just to grab
a few.

I haven't researched who added them and when, but they would certainly
not clear the quality standards we have for imports today. Most of this
information can be properly modelled in usual OSM tags, and where it
cannot, it probably shouldn't be in OSM in the first place.

Is there any systematic (or even sporadic) effort of cleaning up these
old imports? Is there reason to believe that the neglect extends to more
than just the tags - do geometry and topology usually work well on
these, or are the funny tags a huge "this whole area hasn't had any love
in a long time" sign?


Frederik Ramm  ##  eMail frederik at remote.org  ##  N49°00'09" E008°23'33"

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