[GRASS-SVN] r66095 - grass/trunk/raster/r.in.lidar
svn_grass at osgeo.org
svn_grass at osgeo.org
Fri Sep 4 11:06:01 PDT 2015
Author: neteler
Date: 2015-09-04 11:06:01 -0700 (Fri, 04 Sep 2015)
New Revision: 66095
Modified:
grass/trunk/raster/r.in.lidar/r.in.lidar.html
Log:
r.in.lidar manual: minor fixes
Modified: grass/trunk/raster/r.in.lidar/r.in.lidar.html
===================================================================
--- grass/trunk/raster/r.in.lidar/r.in.lidar.html 2015-09-04 02:40:46 UTC (rev 66094)
+++ grass/trunk/raster/r.in.lidar/r.in.lidar.html 2015-09-04 18:06:01 UTC (rev 66095)
@@ -199,10 +199,16 @@
<em>r.mapcalc</em> to remove highly variable points (small <em>n</em>) or run
<em>r.neighbors</em> to smooth the stddev map before further use.]
+<h2>NOTES</h2>
+The typical file extensions for the LAS format are .las and .laz (compressed).
+The compressed LAS (.laz) format can be imported only if libLAS has been compiled
+with laszip support. It is also recommended to compile libLAS with GDAL which is
+used to test if the LAS projection matches that of the GRASS location.
+
<h2>EXAMPLES</h2>
-Import of a LAS file into an existing location/mapset (metric):
+Import of a LAS file into an existing location/mapset (metric units):
<div class="code"><pre>
# set the computational region automatically, resol. for binning is 5m
@@ -213,12 +219,11 @@
<h3>Serpent Mound dataset</h3>
-<p>
This example is analogous to the example used in the GRASS wiki page for
<a href="http://grasswiki.osgeo.org/wiki/LIDAR#Import_LAS_as_raster_DEM">importing LAS as raster DEM</a>.
<p>The sample LAS data are in the file "Serpent Mound Model LAS Data.las",
available at
-<a href="http://www.appliedimagery.com/downloads/sampledata/Serpent%20Mound%20Model%20LAS%20Data.las">appliedimagery.com</a>
+<a href="http://www.appliedimagery.com/downloads/sampledata/Serpent%20Mound%20Model%20LAS%20Data.las">appliedimagery.com</a>:
<div class="code"><pre>
# print LAS file info
@@ -243,25 +248,19 @@
<h3>Height above ground</h3>
-<p>
-Compute mean height above ground of the points for each raster cell
-(ground elevation is given by the raster map <tt>elevation</tt>):
+The mean height above ground of the points can be computed for each
+raster cell (the ground elevation is given by the raster map
+<tt>elevation</tt>):
<div class="code"><pre>
-g.region raster=elevation
+g.region raster=elevation -p
r.in.lidar input=points.las output=height_above_ground base_raster=elevation
</pre></div>
In this type of computation, it might be advantageous to change the resolution
-to match the precision of the points rather then derive it from the base raster.
+to match the precision of the points rather than deriving it from the base raster.
+<!-- TODO: say how -->
-
-<h2>NOTES</h2>
-The typical file extensions for the LAS format are .las and .laz (compressed).
-The compressed LAS (.laz) format can be imported only if libLAS has been compiled
-with laszip support. It is also recommended to compile libLAS with GDAL,
-needed to test for matching projections.
-
<h2>TODO</h2>
<ul>
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