El Miércoles, 9 de octubre de 2013 07:33:43 Federico Jurio escribió: > Dear all, I am using WGS84 (4326) and would like to buffer based on meters > and not degrees. [...] > Can someone please point me in the right direction?
If you have a working PostGIS instance, you can get your geometries as PostGIS geographies, then run st_buffer on them. PostGIS will take care of the dirty work of finding a more-or-less appropiate projection for buffering the geography. > [buffering in degrees] is the easy way and i'm sure that the accuracy isn't > the best. > [reprojecting] probably doesn't have the best performance. This begs the question: What do you want to achieve? Accuracy, or performance? Personally, if PostGIS geographies aren't available, I'd rather reproject whole geometries into WGS84 UTM (EPSG:326xx) depending on the centroid's longitude, then buffer, then project back into WGS84 lat-lon (EPSG:4326). Best, -- Iván Sánchez Ortega <i...@sanchezortega.es> _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
