On Thu, Feb 20, 2014 at 2:24 AM, Michael Moore <[email protected]> wrote: > Hello, > > I think I'm doing something wrong with importing lidar data in GRASS 7. > > My data is a laz file from the state of Minnesota. > > The complicating factor is that the EPSG code is set incorrectly -- > EPSG:32715 / UTM 15 S instead of EPSG:26715/UTM 15 N. My region is set to > the correct 26715. > > I am using the GUI, but the command that it generates is > > v.in.lidar -p -o --overwrite input=/data/3542-27-22.laz output=test > > The output is: > > Over-riding projection check
Something is wrong here: > Importing 0 points... because I get Importing 12588100 points... 100% 12588100 points imported If you compiled GRASS 7 from source, you could go to vector/v.in.lidar and run make clean make and check for any errors or warnings > Building topology for vector map <test@stuporglue>... > Registering primitives... > 0 primitives registered > 0 vertices registered > Building areas... > 0 areas built > 0 isles built > Attaching islands... > Attaching centroids... > Number of nodes: 0 > Number of primitives: 0 > Number of points: 0 > Number of lines: 0 > Number of boundaries: 0 > Number of centroids: 0 > Number of areas: 0 > Number of isles: 0 > 0 points imported > > lasinfo reports 12588100 points. > > > I'd be happy to get this imported either through the command line or the > GUI, but my goal is to understand enough about GRASS to script the creation > of a state-wide DSM from LiDAR data. You can also use r.in.lidar method=min or first convert the .laz file with las2txt, then use r.in.xyz method=min. With the r.in.* modules, the region should be set first, taking particular care about the resolution. Something like # set the region extents to the lidar point cloud extents g.region n= s= e= w= # align the region again to the target resolution g.region res=<target_resolution> -a HTH, Markus M > > Thanks, > Michael Moore > > _______________________________________________ > grass-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/grass-user _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
