Re: SDTS Reader

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Mark Aubin (aubin++at++mustang.engr.sgi.com)
Fri, 24 Sep 1999 11:10:54 -0700 (PDT)

On Sep 24, 10:57am, Sankovet, Michael wrote:
> Subject: SDTS Reader
>
> Hello
>
> I understand that there is a DEM loader included in Performer. However, when
> I go to the USGS web site to get some DEM data It says that the data is in
> SDTS
> Spatial Data Transfer Standard format. My questions is: Does the Performer
> loader
> understand SDTS? or does anyone know of a utility that will convert SDTS
> into
> original DEM?
>
> Thanks
>
> Mike Sankovet
>

What resolution of DEM's are you looking for?

The USGS web site has 1:250,000 scale (90 meter, 1 degree) DEM's all in
the original .dem format for the entire US. This is the format that
the IRIS Performer loader understands.

SDTS is a newer format that the USGS is using for all the 1:24,000
scale (30 meter, 7.5 minute) DEM's. SGI doesn't provide an
IRIS Performer loader for this format, or any conversion software.

USGS "US GeoData" web site:
http://edcwww.cr.usgs.gov/doc/edchome/ndcdb/ndcdb.html

For SDTS info, see:
http://mcmcweb.er.usgs.gov/sdts/

--Mark Aubin

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