[gdal-dev] gdal_grid - very slow

2011-02-07 Thread Werner Reiche
I'm using gdal_grid to create a 1200x796 pixel out from an input data set of approximately 250,000 points. This takes about 90 minutes (30 minutes for each r/g/b band). This seems to be unreasonably slow. Any ideas on speeding it up? The command I am using is: gdal_grid -txe -51.428009 -43.

[gdal-dev] gdal_grid - cannot get interpolation to work

2011-01-27 Thread Werner Reiche
I'm trying to use gdal_grid to generate a .tiff file from a .csv file. The problem I am encountering is that output file always contains 'no-data' values. The command I am using is: gdal_grid -txe -51.428009 -43.153992 -tye 46.112598 51.347198 -outsize 1024 796 \ -a nearest:rad