[gdal-dev] GEOTIFF with RAT - transformation unsuccessful (and related warning)

[Giuseppe Triacchini]

 Dear GDAL-DEV Mailing List, 
this is the first time with GDAL for me.I would need to convert a GeoTIFF file already reclassified in Integer values into an analogous GeoTIFF with associated a RAT table.I would need to use it with ESRI ArcGIS Online and apply unique-value style, which seems not feasible with normal raster layers (without RAT including unique categories).I'm not sure that GeoTIFF can support a RAT for ArcGIS, but a friend suggested to follow the two next steps reported below to reach my objective, but it seems that the GTiff function does not support the creation of a RAT table for a TIFF. Can someone more experienced than me confirm this?Is there some alternative solution to create a raster dataset with RAT recognized as such by ESRI  ArcGIS, in particular ArcGIS online?Thanks in advance for your help
Best regards
Giuseppe
The procedure that was supposed to solve the issue:
After creating a DBF file with three essential columns VALUES CLASS and COUNT  where VALUES refers to the distinct integers that are in the GeoTIFF, I used the followingGDA functions:
gdal_translate -of GTiff -co "CREATE_RAT=YES"  InputFile.tif OutputFile_with_rat.tif

The raster is created but I get the following Warning 6: driver GTiff does not support creation option CREATE_RAT
Then I tried to associate anyway the DBF table to the new raster: 
gdaladdo -r OutputFile_with_rat.tif --config RAT_PATH OutputFile_with_rat.dbf

This second command returns a positive feedback "Done"
0...10...20...30...40...50...60...70...80...90...100 - done.






  
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