[gdal-dev] Setting nodata tag with Python API

[Roger André]

Hi All,

I'm using the Python API to build some GeoTIFFs and would like to set
the nodata value to -9999 at creation time.  How do I do that?  Below
is a sample of my code

  def makeRaster(self):
    out_drv = gdal.GetDriverByName('GTiff')
    out_ds = out_drv.Create(self.raster_name, 4320, 2160 , 1, gdal.GDT_Float32)
    out_ds.SetGeoTransform([-180, 0.0833330, 0, 90, 0, -0.0833330])
    out_band = numpy.zeros([out_ds.RasterYSize, out_ds.RasterXSize])
    for iY in range(out_ds.RasterYSize):
      for iX in range(out_ds.RasterXSize):
        alloc_key = self.makeAllocKey(iY + 1, iX + 1)
        pixel_value = self.checkPixel(alloc_key)
        out_band[iY][iX] = pixel_value
    out_ds.GetRasterBand(1).WriteArray(out_band)
    out_ds = None

Thanks,

Roger
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