USGS Urban coverage shapefile

[Stephen Woodbridge]

Hello Thomas,

I am not familiar with this raster layer, but if it has the Urban areas
in a constant color in the raster, then you could do a lat/lon query of
the raster layer and get back the pixel value. Then decide based on the
pix value whether it falls into an Urban area.

The Tiger data also defines Urban areas as polygons so you might be able
to work with that.

-Steve W.
  http://imaptools.com

Thomas Chesky wrote:
> Hello,
>
> Does anybody know how to get the boundary of USGS Urban ortho coverage
> in shapefile (or WKT etc.) format. I could only found the coverage index
> in raster format on the USGS site (seamless.usgs.gov) I'd like to be
> able to tell having a lat/lon coordinates whether it falls into one of
> the Urban coverage areas. The USGS WMS server provides boudary rectangle
> only (in GetCapabilities), which obviously will not solve my problem as
> the coverages are not rectangles.
>
> There must be something like this otherwise how could USGS create the
> raster coverage index.
>
> Any help is greatly appreciated.
>
> Thomas
>
> ps I emailed USGS as well but not yet received any reply
>
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