[gdal-dev] help for including category names

[Marcel Derrien]

Hello,
I am new with gdal, and it is my first post here.
I have a gdal 1.8.0 installed on a cenOS Linux x86_64 ,with libtiff 
3.9.4 and libgeotiff 1.3.0.
I try the translation of a raster dataset to geotiff through a 
VRTRawRasterBand described in a VRT file using gdal_translate.
gdal_translate test.vrt test.tif
The VRT file includes a category list description that I would like to 
get in the resulting geotiff.
The geotiff produced is correct but the only thing that is missing is 
the category names that I can't see with gdalinfo.
It seems as if the category list was not managed, as the resulting file 
size is the same with and without the categorynames section in the VRT.
I suspect my gdal installation or maybe I have a bad understanding of 
the way to manage this option.
Could somebody help to find an explanation ?

gdal-config --version
1.8.0
gdal-config --dep-libs
-lsqlite3 -L/usr/lib64/lib -lexpat -lgif -ljpeg 
-L/export/util/libgeotiff-1.3.0/lib -lgeotiff 
-L/export/util/tiff-3.9.4/lib -ltiff -lpng -L/export/util/netcdf-3.6.2 
-L/export/util/netcdf-3.6.2/lib -lnetcdf -lz -lpthread -lm -lrt -ldl 
-L/usr/kerberos/lib64 -lcurl -lgssapi_krb5 -lkrb5 -lk5crypto -lcom_err 
-lresolv -ldl -lidn -lssl -lcrypto -lz


gdalinfo t.tif

Driver: GTiff/GeoTIFF
Files: t.tif
Size is 3712, 3712
Coordinate System is:
PROJCS["Geostationary_Satellite",
    GEOGCS["GCS_unnamed ellipse",
        DATUM["D_unknown",
            SPHEROID["Unknown",6378169,295.4880658970008]],
        PRIMEM["Greenwich",0],
        UNIT["Degree",0.017453292519943295]],
    PROJECTION["Geostationary_Satellite"],
    PARAMETER["central_meridian",0],
    PARAMETER["satellite_height",35785831],
    PARAMETER["false_easting",0],
    PARAMETER["false_northing",0],
    UNIT["Meter",1]]
Origin = (-5570248.832537000067532,5570248.832537000067532)
Pixel Size = (3000.403357000000142,-3000.403357000000142)
Metadata:
  AREA_OR_POINT=Area
Image Structure Metadata:
  INTERLEAVE=BAND
Corner Coordinates:
Upper Left  (-5570248.833, 5570248.833)
Lower Left  (-5570248.833,-5567248.429)
Upper Right ( 5567248.429, 5570248.833)
Lower Right ( 5567248.429,-5567248.429)
Center      (   -1500.202,    1500.202)
Band 1 Block=3712x2 Type=Byte, ColorInterp=Palette
  Color Table (RGB with 256 entries)
    0: 100,100,100,255
....

Here is the VRT file content:
<VRTDataset rasterXSize="3712" rasterYSize="3712">
    <GeoTransform>-5570248.832537, 3000.403357, 0.000000, 
5570248.832537, 0.000000, -3000.403357</GeoTransform>
    
<SRS>PROJCS[&quot;Geostationary_Satellite&quot;,GEOGCS[&quot;GCS_unnamed 
ellipse&quot;,DATUM[&quot;D_unknown&quot;,SPHEROID[&quot;Unknown&quot;,6378169,295.4880658970008]],PRIMEM[&quot;Greenwich&quot;,0],UNIT[&quot;degree&quot;,0.0174532925199433]],PROJECTION[&quot;Geostationary_Satellite&quot;],PARAMETER[&quot;central_meridian&quot;,0],PARAMETER[&quot;satellite_height&quot;,35785831],PARAMETER[&quot;false_easting&quot;,0],PARAMETER[&quot;false_northing&quot;,0],UNIT[&quot;metre&quot;,1]]</SRS>
    <Metadata>
    <MDI key="AREA_OR_POINT">Area</MDI>
    </Metadata>
    <Description>Cloud Type Layer</Description>
    <VRTRasterBand dataType="Byte" band="1" subClass="VRTRawRasterBand">
        <ColorInterp>Palette</ColorInterp>
            <ColorTable>
                <Entry c1="100" c2="100" c3="100"/>
                <Entry ...
                ...
            </ColorTable>
        <CategoryNames>
            <Category>Not processed</Category>
            <Category>Cloud-free land</Category>
             ...
            </CategoryNames>
        <SourceFilename relativetoVRT="1">t.fis</SourceFilename>
        <ImageOffset>7424</ImageOffset>
        <PixelOffset>1</PixelOffset>
        <LineOffset>3712</LineOffset>
        <ByteOrder>LSB</ByteOrder>
    </VRTRasterBand>
</VRTDataset>



Thanks in advance,
---
Marcel Derrien

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