Try using the following on your texture file (intexturefile)...

gdalwarp -t_srs "+proj=latlong +datum=WGS84" -r bilinear intexturefile
outtexturefile

"outtexturefile" will then be used as input for osgdem.

-Shayne

-----Original Message-----
From: osg-users-boun...@lists.openscenegraph.org
[mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of
abhishek agarwal
Sent: Thursday, June 09, 2011 9:55 PM
To: osg-users@lists.openscenegraph.org
Subject: [osg-users] [vpb] How to convert texture file to same
coordinatesystem as height file

Hi,

I have a .dem file which i'm using as height and .tif file as texture.
Height file has latitude and longitude coordinate system but texture
file do not. I want to create .osg file combining both using osgdem...
-cs "+proj=latlong +datum=WGS84" -o ...   but its giving some error..

Should both files(height & texture) contain same coordinate
system(geogcs) for me to able to use osgdem, for i want to retrieve
latitude and longitude data at each point of the terrain?

I have given the output of gdalinfo of both files down. Can you help me
with gdal(command) to convert texture file to same coordinate system as
height file so that i can use them to create .osg file using osgdem and
then extract latitude&longitude data for each poit on the terrain.


height file::

Driver: USGSDEM/USGS Optional ASCII DEM (and CDED)
Size is 1802, 1802
Coordinate System is:
GEOGCS["WGS 84",
    DATUM["WGS_1984",
        SPHEROID["WGS 84",6378137,298.257223563,
            AUTHORITY["EPSG","7030"]],
        TOWGS84[0,0,0,0,0,0,0],
        AUTHORITY["EPSG","6326"]],
    PRIMEM["Greenwich",0,
        AUTHORITY["EPSG","8901"]],
    UNIT["degree",0.0174532925199433,
        AUTHORITY["EPSG","9108"]],
    AXIS["Lat",NORTH],
    AXIS["Long",EAST],
    AUTHORITY["EPSG","4326"]]
Origin = (75.749861111111116,34.750416666666666)
Pixel Size = (0.000277777777778,-0.000277777777778)
Metadata:
  AREA_OR_POINT=Point
Corner Coordinates:
Upper Left  (  75.7498611,  34.7504167) ( 75d44'59.50"E, 34d45'1.50"N)
Lower Left  (  75.7498611,  34.2498611) ( 75d44'59.50"E, 34d14'59.50"N)
Upper Right (  76.2504167,  34.7504167) ( 76d15'1.50"E, 34d45'1.50"N)
Lower Right (  76.2504167,  34.2498611) ( 76d15'1.50"E, 34d14'59.50"N)
Center      (  76.0001389,  34.5001389) ( 76d 0'0.50"E, 34d30'0.50"N)
Band 1 Block=1802x1802 Type=Int16, ColorInterp=Undefined
  NoData Value=-32767
  Unit Type: m

texture file::
Driver: GTiff/GeoTIFF
Size is 1802, 1802
Coordinate System is `'
Metadata:
  TIFFTAG_SOFTWARE=IrfanView
  TIFFTAG_XRESOLUTION=762
  TIFFTAG_YRESOLUTION=762
  TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch)
Corner Coordinates:
Upper Left  (    0.0,    0.0)
Lower Left  (    0.0, 1802.0)
Upper Right ( 1802.0,    0.0)
Lower Right ( 1802.0, 1802.0)
Center      (  901.0,  901.0)
Band 1 Block=1802x1 Type=Byte, ColorInterp=Red
Band 2 Block=1802x1 Type=Byte, ColorInterp=Green
Band 3 Block=1802x1 Type=Byte, ColorInterp=Blue

Thank you!

Cheers,
abhishek

------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=40322#40322





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