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Re: DEM and DLG in SDTS [message #21725]

Mon, 18 September 2000 20:33

Sylvain Carette
Messages: 19
Registered: May 2000

Junior Member

<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
Glad you say old format was "simple"... :-)
They provide lot of links for sdts specifications and source code for
reader but probably you already know those.
 Just in case here anyway:
  <a href="http://mcmcweb.er.usgs.gov/sdts/">SDTS Home Page</a>
 especially: <a href="http://mcmcweb.er.usgs.gov/sdts/public_domain.html">Public
Domain software</a>  where you'll get  <a href="http://mcmcweb.er.usgs.gov/sdts/source.html">Support
software for programmers</a>  for C and C++ library which you can
"translate" to idl if you feel for it or perhaps just complile them and
use as external module - sdts++  <a href="http://mcmcweb.er.usgs.gov/sdts/sdtsxx/index.html">SDTS++
Home Page</a>  can be compiled with gnu g++ so probably the easiest
(and free) solution.
I didnt have to use this format (yet) but I'll agree with you that it
look very complicated.
Sylvain Carette
 VRML designer-composer
Kelly Dean wrote:
<blockquote TYPE=CITE> The discussion about DEMs earlier got me thinking
about it again.
 Especially, after working with some recent MODIS imagery.
 Has anyone been successful with reading the 7.5 min DEMs and the
DLGs
 in the Spatial Data Transfer Standard (SDTS) format? USGS has a big
 archive of DEMs and DLGs online, but in this binary SDTS format. Not
the
 simple ASCII files I have worked with in the past.
Kelly Dean
 CSU/CIRA</blockquote>
</html>

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Re: DEM and DLG in SDTS [message #21815 is a reply to message #21725]

Tue, 19 September 2000 00:00

Kelly Dean
Messages: 92
Registered: March 1997

Member

The SDTS Home Page provided some help. A HEX dump provided the most
help, as most of the file and record headers are all in ASCII.

I am able to read and display the DEM/SDTS with IDL. Next task - the
DLG/SDTS.

Kelly

Sylvain Carette wrote:

> Glad you say old format was "simple"... :-)
>
> They provide lot of links for sdts specifications and source code for
> reader but probably you already know those.
> Just in case here anyway:
> SDTS Home Page
> especially: Public Domain software where you'll get Support software
> for programmers for C and C++ library which you can "translate" to
> idl if you feel for it or perhaps just complile them and use as
> external module - sdts++ SDTS++ Home Page can be compiled with gnu
> g++ so probably the easiest (and free) solution.
>
> I didnt have to use this format (yet) but I'll agree with you that it
> look very complicated.
>
> Sylvain Carette
> VRML designer-composer
>
> Kelly Dean wrote:
>
>> The discussion about DEMs earlier got me thinking about it again.
>> Especially, after working with some recent MODIS imagery.
>>
>> Has anyone been successful with reading the 7.5 min DEMs and the
>> DLGs
>> in the Spatial Data Transfer Standard (SDTS) format? USGS has a big
>> archive of DEMs and DLGs online, but in this binary SDTS format. Not
>> the
>> simple ASCII files I have worked with in the past.
>>
>> Kelly Dean
>> CSU/CIRA
>

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