Thank you Even! ------Messaggio originale------ Da: Even Rouault A: [email protected] Cc: Diego Gnesi Oggetto: Re: [gdal-dev] ReadAsArray: putting data in an already existent array Inviato: 23 mar 2013 20:41
Le vendredi 22 mars 2013 18:47:49, Diego Gnesi Bartolani a écrit : > Hi, > > I'm programming in Python and I need to "scan" a large image with GDAL > reading n rows at the time. I'm using the ReadAsArray method, but every > time I execute it I get a new array. I think this solution consumes a lot > of resources. > Is there a method or option to pass to ReadAsArray an array that already > exists, in order to change it's value, like in the following pseudo-code: > > band1 = ds.GetRasterBand(1) > my_arr = band1.ReadAsArrray([params]) > [Do something with my_arr] > band1.ReadAsArray([params to get other rows], save_to=my_arr) You can try : band1.ReadAsArray([params to get other rows], buf_obj = my_arr) See http://svn.osgeo.org/gdal/trunk/autotest/gcore/numpy_rw.py > > Of course, my_arr must have the correct size for storing incoming data. > > Thanks, > > Diego _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
