On Thu, Sep 30, 2010 at 2:34 PM, Nathan Edgars II <nerou...@gmail.com>wrote:

> On Thu, Sep 30, 2010 at 3:29 PM, Ian Dees <ian.d...@gmail.com> wrote:
> > I don't think you should imply that there is a "natural=forest" boundary
> > logically separate from the National Forest's boundary. Assuming you're
> > using USFS's shapefiles, there should be one thing in there: the boundary
> of
> > the national forest. If there are "holes in the forest" anywhere
> (including
> > directly on the external border), then they should be inner polygons of a
> > multipolygon.
>
> There are two separate definitions of what the national forest is. On
> http://www.fs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb5192654.pdf
> there's the dark green line ("national forest boundary"), but not
> everything inside it is light green fill ("national forest land").
> Both are in the shapefiles.
>

Thanks for the example. I would suggest using a border/boundary tag for the
"national forest boundary" area and a landuse tag for the "national forest
land".

I don't think there are any globally accepted values for this particular
usecase, though. The national park/forest situation in the US is pretty
unique.
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