[Talk-us] Low-quality NHD imports

Wolfgang Zenker wolfgang at lyxys.ka.sub.org
Mon Oct 16 22:56:00 UTC 2017


Hi,

* Charlotte Wolter <techlady at techlady.com> [171016 23:50]:
>          Clifford makes some very good points. In the West, particularly,
> those little intermittent streams are important landmarks. Particularly
> when hiking in a featureless area, such as pinyon-juniper forest, a
> trail direction may say something like, "turn right after crossing the third
> drainage."
> [..]

the problem here is that at least those NHD imports I have seen in
Montana have only some of the existing streams. I don't know if this is
because NHD does not have more or because the import used not all
available streams. "Existing streams" here means both streams seen on
USGS Topo maps and stream beds seen on imagery.

Wolfgang



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