[gdal-dev] How to build a Raster Attribute Table for a GeoTiff grid file using GDAL API in c only, not c++?

[sam sung]

Hello, folks,

Sorry, the attactment was scrubed in my previous email since it  cannot be
in a .rar file.   In this email, I changed the file extension to .rar_1.
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I tried to build a Raster Attribute Table (denoted as RAT below) for a
GeoTiff raster file(attached as “test.tif”) in C within Visual Studio 2008.
This C file was compiled through and there was no errors reported.

I used GDALSetDefaultRAT function, it was successful. But when I used
GDALRATCreateColumn function to create RAT fields, it was always report
errors. I tested how well the c++ file “rfc40_tests_hfa.cpp”
works(Downloaded from the GDAL forum). I found this code only works on HFA
driver, i.e., .img grid file, not .tif grid because the same errors occur
when I changed the driver from “HFA” to “GTiff”,

 I downloaded and used gdal-110-1500-core.msi, which is gdal 1.10 version
API library for Windows. I worked with C++ under Visual Studio 2008
professional.

 I have attached the GeoTiff file as "test.tif" and my C source code file
"gtiff_rat.c". I also attached the c++ file “rfc40_tests_hfa.cpp”.

 My question: Is GDAL API able to be used to build a Raster Attribute Table
for GeoTiff raster?

Any help will be appriciated.





 Regards,

Sam
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