Julian Burgos wrote: > Sorry if this is a basic question...I´m taking my fist > steps with GIS/GRASS. > I have a relatively large dataset (~250000 rows) consisting > of lat, long and a data value. The data has been > collected in a regular grid, but the grid is "tilted". > In other words, along a row the latitude values increase > constantly, and along a column the longitude values do the > same. I need to to convert this data to a raster > file. I have no information on the native projection > of the data. > Any ideas/tips/suggestions on how to tackle this?
r.in.xyz run it first to scan & find the bounds (If you don't know already) run g.region to set the region bounds and resolution, as needed run r.in.xyz with method=n, then run r.univar on the output to ensure that every cell has just one value in it (input grid = output grid) finally, when you are convinced that you have the grids lined up correctly run r.in.xyz with method=mean (or at this point min or max, should all be the same if n is always = 1) > I have a large dataset no problem at all. Hamish _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
