I have a NITF image that has the following colorinterp: Band 1 Block=640x480 Type=Byte, ColorInterp=YCbCr_Y Band 2 Block=640x480 Type=Byte, ColorInterp=YCbCr_Cb Band 3 Block=640x480 Type=Byte, ColorInterp=YCbCr_Cr and GDALRasterBand::GetBlockRef(0,0) returns a null block. Is this type of colorinterp supported? Thanks, Gao, Peng