Thank you!
How about strm 90m DEM? Do you make terrain in earth as I do?
Cheers,
GuiYe
At 2011-05-17 17:35:48，"Torben Dannhauer" <tor...@dannhauer.info> wrote:
>Hi,
>
>You use ASTER data? Am I right that ASTER is public available? I played 2
>years ago with the ASTER data as it was initially released. It has great
>resolution, but it had also lots of artefacts. Do you use raw or somehow
>corrected ASTER data? - As you can see, I'm on the never ending quest for
>public available DEM and texture data :)
>
>Well, in the DEM raster data, some value represents zero meters elevation. To
>achieve a smooth transition, you should blend at the border of your source
>images from your original value to that null value.
>
>In a geotiff, this would be a blending of the grey value (which represents the
>elevation). You can perform this blending in a graphical software like gimp.
>Your blending zone has to be a "frame" at the border of your DEM region. You
>have to blend from the original elevation value to the 0 meters elevation
>value -for example with a alpha value ramp (inside your blending zone 100%
>elevation and 0% 0-meters-color, at the outer border of your DEM-Data 0%
>elevation and 100% 0-meters-color)
>
>Sorry for that bad explanation.. :)
>
>Cheers,
>Torben
>
>------------------
>Read this topic online here:
>http://forum.openscenegraph.org/viewtopic.php?p=39454#39454
>
>
>
>
>
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