Function msGetGDALNoDataValue

mapdrawgdal.c:2516–2546

/ msGetGDALNoDataValue() */ /

/*                          msGetGDALNoDataValue()                      */
/************************************************************************/
double 
msGetGDALNoDataValue( layerObj *layer, void *hBand, int *pbGotNoData )

{
    const char *pszNODATAOpt;

    *pbGotNoData = FALSE;

/* -------------------------------------------------------------------- */
/*      Check for a NODATA setting in the .map file.                    */
/* -------------------------------------------------------------------- */
    pszNODATAOpt = CSLFetchNameValue(layer->processing,"NODATA");
    if( pszNODATAOpt != NULL )
    {
        if( EQUAL(pszNODATAOpt,"OFF") || strlen(pszNODATAOpt) == 0 )
            return -1234567.0;
        if( !EQUAL(pszNODATAOpt,"AUTO") )
        {
            *pbGotNoData = TRUE;
            return atof(pszNODATAOpt);
        }
    }
    
/* -------------------------------------------------------------------- */
/*      Check for a NODATA setting on the raw file.                     */
/* -------------------------------------------------------------------- */
    if( hBand == NULL )
        return -1234567.0;
    else
        return GDALGetRasterNoDataValue( hBand, pbGotNoData );
}

/************************************************************************/
/*                         msGetGDALBandList()                          */