[osg-users] Convert .earth file to .osg format

[Steven Jones]

Chris,

When I examine an image GeoTiff with GDALinfo, here's what is output:

Driver: GTiff/GeoTIFF
Files: N33W118_D004_S001_T001_L00_U0_R0a.tif
Size is 1024, 1024
Coordinate System is:
GEOGCS["WGS 84",
    DATUM["WGS_1984",
        SPHEROID["WGS 84",6378137,298.257223563,
            AUTHORITY["EPSG","7030"]],
        AUTHORITY["EPSG","6326"]],
    PRIMEM["Greenwich",0],
    UNIT["degree",0.0174532925199433],
    AUTHORITY["EPSG","4326"]]
Origin = (-118.000000000000000,34.000000000000000)
Pixel Size = (0.000976562500000,-0.000976562500000)
Metadata:
  AREA_OR_POINT=Area
  TIFFTAG_SOFTWARE=GeoJasPer <www.dimin.net>
Image Structure Metadata:
  COMPRESSION=JPEG
  INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left  (-118.0000000,  34.0000000) (118d 0' 0.00"W, 34d 0' 0.00"N)
Lower Left  (-118.0000000,  33.0000000) (118d 0' 0.00"W, 33d 0' 0.00"N)
Upper Right (-117.0000000,  34.0000000) (117d 0' 0.00"W, 34d 0' 0.00"N)
Lower Right (-117.0000000,  33.0000000) (117d 0' 0.00"W, 33d 0' 0.00"N)
Center      (-117.5000000,  33.5000000) (117d30' 0.00"W, 33d30' 0.00"N)
Band 1 Block=256x256 Type=Byte, ColorInterp=Red
Band 2 Block=256x256 Type=Byte, ColorInterp=Green
Band 3 Block=256x256 Type=Byte, ColorInterp=Blue

This is one of the GeoTiff elevation files:

Driver: GTiff/GeoTIFF
Files: N33W118_D001_S001_T001_L00_U0_R0.tif
Size is 1024, 1024
Coordinate System is:
GEOGCS["WGS 84",
    DATUM["WGS_1984",
        SPHEROID["WGS 84",6378137,298.257223563,
            AUTHORITY["EPSG","7030"]],
        AUTHORITY["EPSG","6326"]],
    PRIMEM["Greenwich",0],
    UNIT["degree",0.0174532925199433],
    AUTHORITY["EPSG","4326"]]
Origin = (-118.000488281250000,33.999511718750000)
Pixel Size = (0.000976562500000,-0.000976562500000)
Metadata:
  AREA_OR_POINT=Point
Image Structure Metadata:
  INTERLEAVE=BAND
Corner Coordinates:
Upper Left  (-118.0004883,  33.9995117) (118d 0' 1.76"W, 33d59'58.24"N)
Lower Left  (-118.0004883,  32.9995117) (118d 0' 1.76"W, 32d59'58.24"N)
Upper Right (-117.0004883,  33.9995117) (117d 0' 1.76"W, 33d59'58.24"N)
Lower Right (-117.0004883,  32.9995117) (117d 0' 1.76"W, 32d59'58.24"N)
Center      (-117.5004883,  33.4995117) (117d30' 1.76"W, 33d29'58.24"N)
Band 1 Block=1024x1 Type=Float32, ColorInterp=Gray

I don't see the measurement value type, but I'm fairly sure they are both in meters. (I also confirmed the above data in QGIS.)

I'll also look into gdalbuildvrt - Thanks!

Steven

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http://forum.openscenegraph.org/viewtopic.php?p=75920#75920