Changes between Version 6 and Version 7 of Processing/LIDARDEMs


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Timestamp:
Apr 10, 2008 3:08:06 PM (11 years ago)
Author:
benj
Comment:

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  • Processing/LIDARDEMs

    v6 v7  
    49493. Check the LIDAR data projection in the header file. Open GRASS, select (or create) an a location in the appropriate projection and set the region appropriately for the dataset - easiest way is to look at the start of the trimmed lidar data file for the starting co-ordinates of the first line, set an approximate region from there, view the map in GRASS and then adjust the region appropriately.
    5050
    51 4. Read in the trimmed lidar file using r.in.xyz:
     514. Read in the trimmed lidar file using r.in.xyz. Note that for large areas this will use a LOT of memory - if the command refuses to start complaining of a lack of memory, use the percent argument and the command will automatically run in several passes - this will take longer, but use less memory on each pass.
    5252{{{
    53 r.in.xyz input=<trimmed_lidar_file> output=<lidar_basemap> x=2 y=3 z=4 fs=" " zrange=<min_cutoff>,<max_cutoff>
     53r.in.xyz input=<trimmed_lidar_file> output=<lidar_basemap> x=2 y=3 z=4 fs=" " zrange=<min_cutoff>,<max_cutoff> [percent=xx%]
    5454}}}
    5555