ASTER Global Digital Elevation Map |
ASTER Global Digital Elevation Map |
Jul 14 2009, 08:09 PM
Post
#1
|
||
IMG to PNG GOD Group: Moderator Posts: 2250 Joined: 19-February 04 From: Near fire and ice Member No.: 38 |
I'm a bit surprised this global DEM of the Earth released roughly 2 weeks ago hasn't been discussed here yet. The horizontal resolution is 30 m and the vertical accuracy 20 m, both at 95% confidence.
The procedure for downloading data is described at http://asterweb.jpl.nasa.gov/gdem-wist.asp I downloaded a single 1x1° tile (there are more than 20,000 1x1° tiles) - it is provided as a 3601x3601 pixel GeoTIFF file. This thing looks very promising. A quick-and-dirty test rendering: This rendering has a 35° field of view, the altitude is 22 km and the mountains typically are about 700-1200 m high. I don't have a suitable texture map to drape over this particular part of the DEM but I didn't want it in this case anyway as I made this rendering to check the DEM's quality. This is a far better (in terms of resolution) rendering than I have have ever before been able to make from publicly available DEM data, at least for this part of our planet. Now all I need to do is find suitable satellite images to use as a texture map and to download some additional DEM tiles... |
|
|
||
Lo-Fi Version | Time is now: 29th March 2024 - 03:51 PM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE COPYRIGHT |
OPINIONS AND MODERATION Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators. |
SUPPORT THE FORUM Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member. |