Write geotiff with GDAL library

Quote:

Hello everyone, i am using the GDAL library to write a GeoTiff file and then I achieved some result and result is good as you can see on below but I want a RGB GeoTiff image. If you click on this lick you can see the result. "http://tinypic.com/r/aomfs5/9"

GDALDataset* newDataSet;
GDALDriver*  driverTiff;
driverTiff = GetGDALDriverManager()->GetDriverByName( "GTiff" );
newDataSet = driverTiff->Create( "New file name", _col, _row, 1, GDT_Float32, NULL ); 

double adfGeoTransform[ 6 ] = { -5500000, 4000, 0, 5500000, 0, -4000 };
newDataSet->SetGeoTransform( adfGeoTransform );

float* newRow = ( float* ) CPLMalloc( sizeof( float ) * _col );
	
float fMax = pow( 2.0, 10 );
float fRange = fMax - 1;
float fRate = (float)256 / fRange; 

for( int i = 0; i < _row; i++ )
	{
		for( int j = 0; j < _col; j++ )
		{
			int val = _dataD[ i * _col + j ];->"I am getting the data from here"
			int value = (int)( 0.5 + val * fRate );

			if( value < 0 ) value = 0;
			if( value > 255 ) value = 255;

			newRow[ j ] = value;
		}
newDataSet->GetRasterBand( 1 )->RasterIO( GF_Write, 0, i, _col, 1, newRow, _col, 1, GDT_Float32, 0, 0 );
	
	}
newDataSet->SetProjection("WGS84");

GDALClose( newDataSet );
GDALDestroyDriverManager();