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Perfect SRTM Project |
DG Void Killer -An utilitie to eliminate those nasty SRTM voids
DGTV - A fine and User-Friendly freeware program to view and edit SRTM files.
edcsgs9.cr.usgs.gov/ The Right Place to download SRTM files, connect using a FTP Client and go to the "pub/data/srtm/" folder and then select your region.
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One
of the main problems are the voids: Voids
are points of the SRTM data tiles that contain no data, this happens to bad radar scatter
and on some places sutch as the Alps, shown on the picture above, the voids clearly
disturb the terrain perception. We
developed a simple aplication to remove this voids by mixing SRTM and GTOPO30 data, here
is the result: As
you can see the result is surprisingly fine, althought the poorest resolution of GTOPO30
data set, the terrain perception is anyway realistic, as you can see on a 3D view of the
same area: Here
comes Perfeft SRTM Project, combining SRTM raster elevation data with several other data
sets sutch as GTOPO30 and vectorial shore lines, rivers, lakes, etc. We are able to
correct those errors.
On a 3D view of an estuary, the improvement is even more obvious:
We believe this technique would be quite usefull as fast and reliable way to get
elevation data from around the world. SRTM Data Set is for example being adored
by flight simulation enthusiast who now have more detailed landscapes to fly around.
Specialy now that the Europe SRTM and Asia were finally released. |