[Gdal-dev] Python ReadRaster arguments

[Gregory, Matthew]

Apologies for what is likely a newbie question, but the documentation
for gdal.Band.ReadRaster() shows this parameter list:

def ReadRaster(*args, **kwargs):
        """
        ReadRaster(self, int xoff, int yoff, int xsize, int ysize, int
buf_len, 
            int buf_xsize=0, int buf_ysize=0, int buf_type=0) -> CPLErr
        """
        return _gdal.Band_ReadRaster(*args, **kwargs)

However, in all the examples I have seen, it looks like the "buf_len"
parameter is not given, e.g. (from
http://www.gdal.org/gdal_tutorial.html):

scanline = band.ReadRaster( 0, 0, band.XSize, 1, band.XSize, 1,
GDT_Float32 )

Can someone clarify the discrepancy?

thanks, matt

Matt Gregory
Faculty Research Assistant
Department of Forest Science
Oregon State University
Phone : (541) 758-7778
Email : matt.gregory at oregonstate.edu