Thanks Dane, I'll dig through GDAL!
________________________________ From: Dane Springmeyer [mailto:[email protected]] Sent: Tuesday, July 07, 2009 12:03 PM To: Lewis, Ambrose J. Cc: [email protected] Subject: Re: [Mapnik-users] GDAL datasource question... Lewis, There is currently no support within Mapnik to handle no-data values. I'd recommend using gdal utilities (like gdal_translate or gdal_fillnodata.py) to handle no-data values before sending along to Mapnik. Dane On Jul 7, 2009, at 8:20 AM, Lewis, Ambrose J. wrote: Hi All: I'm very new to Mapnik, so please be patient with a dumb question! I'm trying to use Mapnik to read a DTED file from my Python program. I modified the GDAL example found in "mapnik-utils-read-only\example_code\gdal" by simply changing this line: lyr.datasource = Gdal(file='blake2rgb.tif') to point to my DTED file: lyr.datasource = Gdal(file='n44.dt2') The resulting PNG file appears to be a single band with only a very few values displayed. I think this is because DTED null value is "-32,767". Is there a way to make this value something more manageable before calling "render_to_file"? THANXS!!! amb _______________________________________________ Mapnik-users mailing list [email protected] https://lists.berlios.de/mailman/listinfo/mapnik-users
_______________________________________________ Mapnik-users mailing list [email protected] https://lists.berlios.de/mailman/listinfo/mapnik-users
