[Talk-us] NHD status?

[David Carmean]

On Wed, Oct 01, 2008 at 06:19:09PM -0500, Ian Dees wrote:
> On Wed, Oct 1, 2008 at 6:08 PM, David Carmean <dlc at halibut.com> wrote:

> > I think the mapping of FCode to OSM features is going to be very sparse,
> > and
> > I'm currently wishing we had an entire new set of "hydrology=something"
> > feature
> > tags :)
> 
> 
> There really are only a few features I'd like to see put into OSM:
>  - rivers
>  - lakes
>  - swamp areas
>  - drainage ditches
>  - reservoirs
> 
> All of these things have descriptions in NHD, but not all of them have
> descriptions in OSM. Perhaps we should make some tagging proposals, get them
> approved/discussed, then continue with the import.

I've extracted the FCode table from the dataset for my area, and am mapping those 
to existing and proposed map features/tags as found on the wiki.  We can add some 
selection criteria later.  I can upload it to a wiki page when I'm finished.

I think we need a new key, which will be of use in other scopes as well:
"existence".  In particular, for hydrographic features it could have the
values "perennial", "intermittent", or "ephemeral".  In other contexts,
"seasonal", "event", etc.