Changes between Initial Version and Version 1 of Help/LeicaLidarDems


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Timestamp:
May 14, 2009 5:10:16 PM (10 years ago)
Author:
mark1
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  • Help/LeicaLidarDems

    v1 v1  
     1= Creating a DEM from a LIDAR point cloud =
     2
     3This page contains instructions for creating a DEM from the ASCII point clouds acquired from the Leica ALS50 II in 2009 onwards. Instructions are given for using your ARSF data in four GIS systems:
     4 * ArcGIS
     5 * ENVI
     6 * ERDAS Imagine
     7 * GRASS
     8There is also a section giving instructions on how to make your DEM suitable for use in the azgcorr software.
     9----------
     10== ArcGIS ==
     11
     12----------
     13== ENVI ==
     14
     15-----------
     16== ERDAS Imagine ==
     17
     18------------
     19== GRASS ==
     20
     21------------
     22== Making the DEM suitable for azgcorr ==
     23To make a suitable ASCII DEM for us in the azgcorr software, the header information of the ASCII DEM file must be in a certain format. The required format is to have a header of one line (the first line of the file) with the DEM data following. The format is (as given by the azgcorr help):
     24
     25`or c r xm ym xx yx gi`
     26
     27where:
     28
     29or = row order of the data [0 if South to North, 1 if North to South]
     30
     31c  = number of columns
     32
     33r  = number of rows
     34
     35xm = minimum easting
     36
     37ym = minimum northing
     38
     39xx = maximum easting
     40
     41yx = maximum northing
     42
     43gi = grid size (spacing)
     44
     45An example header might be: 1 2000 2000 400000 850000 410000 860000 5
     46