[Geowanking] new global topographic data set

[Mike Liebhold]

Attention: 3D Globe builders: A new high res global topographic data set 
will be released in November(?)  from the USGS Shuttle Radar Toopography 
Mission  data center <http://seamless.usgs.gov/>
<http://seamless.usgs.gov/>
Here's the details:

Earth Has a New Look <http://www.jpl.nasa.gov/releases/2003/116.cfm#topofpg>
August 22, 2003

...

Produced by the Shuttle Radar Topography Mission, the global data set, 
called "SRTM30," greatly improves maps of Earth's land mass located 
between 60 degrees north and 60 degrees south of the equator. That's 
roughly from the southern tip of Greenland to below the southern tip of 
South America.

Until now, the primary source of digital elevation data for scientists 
and analysts involved in global studies has been the U.S. Geological 
Survey's "GTOPO30," published in 1996, which consists of elevation 
measurements spaced every 30-arc-seconds. An arc-second is a measure of 
latitude and longitude used by geographers that corresponds to about 928 
meters, or 3,045 feet, at the equator. This allows identification of 
features roughly the size of Disneyland in California. The SRTM30 map 
matches the GTOPO30 resolution, but with its seamless quality represents 
a leap in global-scale accuracy.


/mike
www.starhill.us

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