areacoverimage.py 文件源码

def createImageDS(filename, x_min, y_min, x_max, y_max, pixel_size,  srs=None):
    # Create the destination data source
    x_res = int((x_max - x_min) / pixel_size) # resolution
    y_res = int((y_max - y_min) / pixel_size) # resolution
    ds = gdal.GetDriverByName('GTiff').Create(filename, x_res,
            y_res, 1, gdal.GDT_Byte)
    ds.SetGeoTransform((
            x_min, pixel_size, 0,
            y_max, 0, -pixel_size,
        ))
    if srs:
        # Make the target raster have the same projection as the source
        ds.SetProjection(srs.ExportToWkt())
    else:
        # Source has no projection (needs GDAL >= 1.7.0 to work)
        ds.SetProjection('LOCAL_CS["arbitrary"]')

    # Set nodata
    band = ds.GetRasterBand(1)
    band.SetNoDataValue(0)

    return ds