[OSM-talk] Mass-replace outdated water=salt

[Mike Thompson]

On Wed, Nov 10, 2021 at 1:39 PM Mike Thompson <miketho16 at gmail.com> wrote:

> 2) Salt water in Colorado? This seems a little unlikely.  I downloaded
> some of the NHD and I can't see how the original importer determined that
> these were salt water.  There is a possible ftype in the NHD for estuary
> which would imply salt water, but the features I looked at didn't have this
> ftype.  A mass mechanical edit may simply perpetuate bad data here.
>
>  In Colorado there are ~4,445 objects in the OSM database with water=salt.
All but two of them are intermittent bodies of water and those two were
originally intermittent in the NHD import, but were subsequently edited. I
suspect that the original importer made the assumption that intermittent
implied salt water, or perhaps intermittent plus some other condition, such
as no draining perennial waterway.  In any event, I don't think this is a
valid assumption.  Rather than a mechanical edit, a better option might be
to create a map roulette challenge.

Mike

>
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