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| GeoCommunity Mailing List |
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| Mailing List Archives |
| Subject: | RE: GISList: whole earth DEM needed |
| Date: |
03/27/2002 07:21:16 PM |
| From: |
=?iso-8859-1?Q?Silv=E8re?= Martin-Michiellot |
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Hi,
>The GTOPO30 site (see link below) is definitely still up, but I have no idea
>why you can't access it from your home in France.
Still not working but got the files from japan.
US restrictions I believe.
>You can also purchase the GTOPO30 data from USGS on CD-ROM media for $10 per
>CD x 5 CD's.
Download is fgaster and cheaper. But you are right, CD version is useful
espacially for:
>I wouldn't recommend holding your breath waiting for a new "near" global
>elevation data set from NASA. If you are talking about the Shuttle Radar
>Topography Mission (http://www.jpl.nasa.gov/srtm/dataprod.htm), here's some
>idea of what to expect (quote from NASA-JPL's website):
>
>"Ultimately, the final released SRTM Digital Elevation Models will be at 30
>meters for the United States and at 90 meters for the rest of the world,
>although NASA and NIMA are still discussing these issues"
This is nevertheless 11 times the 1km resolution. This also means bigger
download, and more data to process. I'll will wait a bit.
Surely a 70GB terrain map is perhaps two much. Look at our site if you want
more info.
>Only some data samples have been released so far, and as I understand it
>none of these are considered final products. I am not aware of the schedule
>for release or distribution of any of the SRTM products.
>
>If I am wrong about this, somebody please correct me and shed some light on
>the subject.
>
>Todd
>
By the way:
Robert Heitzman wrote:
>http://data.geocomm.com/catalog/FR/group121.html
>has DTED 0 data for France which I believe is about the same resolution as
>GTopo30
I really find the way the info is built a real mess. I hope a descent
distribution and a real file format will be available someday.
In the mean time, have fun and thanks you all for your support.
__________________________________________________________________________________________
Silvere Martin-Michiellot builds the Internet future on
www.digitalbiosphere.com
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