Hi,

i have built one simple terrain database but with some visual problems
[Image: http://img405.imageshack.us/img405/2875/screenshot0c.jpg ] 
(http://img405.imageshack.us/i/screenshot0c.jpg/)

here the gdalinfo for the elevation

> 
> Driver: GTiff/GeoTIFF
> Files: SRTM_u03_p198r035.tif
> Size is 2776, 2629
> Coordinate System is:
> PROJCS["unnamed",
>     GEOGCS["WGS 84",
>         DATUM["WGS_1984",
>             SPHEROID["WGS 84",6378137,298.2572235630016,
>                 AUTHORITY["EPSG","7030"]],
>             AUTHORITY["EPSG","6326"]],
>         PRIMEM["Greenwich",0],
>         UNIT["degree",0.0174532925199433],
>         AUTHORITY["EPSG","4326"]],
>     PROJECTION["Transverse_Mercator"],
>     PARAMETER["latitude_of_origin",0],
>     PARAMETER["central_meridian",-3],
>     PARAMETER["scale_factor",0.9996],
>     PARAMETER["false_easting",500000],
>     PARAMETER["false_northing",0],
>     UNIT["unknown",1],
>     AUTHORITY["EPSG","32630"]]
> Origin = (602850.360065498270000,4109954.246528784300000)
> Pixel Size = (90.000000000000000,-90.000000000000000)
> Metadata:
>   AREA_OR_POINT=Area
>   TIFFTAG_XRESOLUTION=100
>   TIFFTAG_YRESOLUTION=100
> Image Structure Metadata:
>   INTERLEAVE=BAND
> Corner Coordinates:
> Upper Left  (  602850.360, 4109954.247) (  1d50'31.60"W, 37d 7'49.07"N)
> Lower Left  (  602850.360, 3873344.247) (  1d52'22.63"W, 34d59'50.94"N)
> Upper Right (  852690.360, 4109954.247) (  0d57'59.84"E, 37d 4'10.40"N)
> Lower Right (  852690.360, 3873344.247) (  0d51'40.54"E, 34d56'28.62"N)
> Center      (  727770.360, 3991649.247) (  0d28'18.09"W, 36d 2'33.94"N)
> Band 1 Block=2776x1 Type=Int16, ColorInterp=Gray
> 


and the imagery

> 
> Warning 1: TIFFFetchNormalTag:ASCII value for tag "GeoASCIIParams" contains 
> null
>  byte in value; value incorrectly truncated during reading due to 
> implementation
>  limitations
> 
> 
> 
> Driver: GTiff/GeoTIFF
> Files: oran_merged.tif
> Size is 10726, 4930
> Coordinate System is:
> PROJCS["unnamed",
>     GEOGCS["WGS 84",
>         DATUM["WGS_1984",
>             SPHEROID["WGS 84",6378137,298.2572235630016,
>                 AUTHORITY["EPSG","7030"]],
>             AUTHORITY["EPSG","6326"]],
>         PRIMEM["Greenwich",0],
>         UNIT["degree",0.0174532925199433],
>         AUTHORITY["EPSG","4326"]],
>     PROJECTION["Transverse_Mercator"],
>     PARAMETER["latitude_of_origin",0],
>     PARAMETER["central_meridian",-3],
>     PARAMETER["scale_factor",0.9996],
>     PARAMETER["false_easting",500000],
>     PARAMETER["false_northing",0],
>     UNIT["unknown",1],
>     AUTHORITY["EPSG","32630"]]
> Origin = (648054.375004862550000,3980488.125094669400000)
> Pixel Size = (14.249096525987330,-14.249096525987330)
> Metadata:
>   AREA_OR_POINT=Point
> Image Structure Metadata:
>   INTERLEAVE=PIXEL
> Corner Coordinates:
> Upper Left  (  648054.375, 3980488.125) (  1d21'29.63"W, 35d57'27.25"N)
> Lower Left  (  648054.375, 3910240.079) (  1d22'16.08"W, 35d19'27.98"N)
> Upper Right (  800890.184, 3980488.125) (  0d20'4.69"E, 35d55'20.84"N)
> Lower Right (  800890.184, 3910240.079) (  0d18'30.50"E, 35d17'24.46"N)
> Center      (  724472.280, 3945364.102) (  0d31'16.60"W, 35d37'35.78"N)
> Band 1 Block=10726x1 Type=Byte, ColorInterp=Red
> Band 2 Block=10726x1 Type=Byte, ColorInterp=Green
> Band 3 Block=10726x1 Type=Byte, ColorInterp=Blue
> 



thanks and good day

------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=26816#26816





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