[GRASS-SVN] r66188 - grass/trunk/vector/v.lidar.edgedetection
svn_grass at osgeo.org
svn_grass at osgeo.org
Sun Sep 13 05:47:50 PDT 2015
Author: martinl
Date: 2015-09-13 05:47:50 -0700 (Sun, 13 Sep 2015)
New Revision: 66188
Modified:
grass/trunk/vector/v.lidar.edgedetection/v.lidar.edgedetection.html
Log:
v.lidar.edgedetection: manual cosmetics (authors last)
Modified: grass/trunk/vector/v.lidar.edgedetection/v.lidar.edgedetection.html
===================================================================
--- grass/trunk/vector/v.lidar.edgedetection/v.lidar.edgedetection.html 2015-09-13 12:24:32 UTC (rev 66187)
+++ grass/trunk/vector/v.lidar.edgedetection/v.lidar.edgedetection.html 2015-09-13 12:47:50 UTC (rev 66188)
@@ -4,8 +4,8 @@
LiDAR data. The filter aims to recognize and extract attached and
detached object (such as buildings, bridges, power lines, trees, etc.)
in order to create a Digital Terrain Model.
-<br>
-<br>
+
+<p>
In particular, this module detects the edge of each single feature over
the terrain surface of a LIDAR point surface. First of all, a bilinear
spline interpolation with a Tychonov regularization parameter is
@@ -26,13 +26,12 @@
the low threshold, its residual is greater than or equal to zero, and the
gradient to two of eight neighboring points is greater than the high
threshold. Other points are classified as TERRAIN.
-<br>
-<br>
+
+<p>
The output will be a vector map in which points has been classified as
TERRAIN, EDGE or UNKNOWN. This vector map should be the input of
-<em>v.lidar.growing</em> module.
+<em><a href="v.lidar.growing.html">v.lidar.growing</a></em> module.
-
<!-- TODO: review how it is with layers and cats -->
<h2>NOTES</h2>
@@ -40,31 +39,29 @@
the next module of the procedure of LiDAR data filtering. In this table
the interpolated height values of each point will be recorded. Also points
in the output vector map will be classified as:
-<br>
-<br>
+
+<div class="code"><pre>
TERRAIN (cat = 1, layer = 1)
-<br>
EDGE (cat = 2, layer = 1)
-<br>
UNKNOWN (cat = 3, layer = 1)
-<br>
-The final result of the whole procedure (v.lidar.edgedetection,
-v.lidar.growing, v.lidar.correction) will be a point classification in
-four categories:
-<br>
-<br>
+</pre></div>
+
+The final result of the whole procedure (<em>v.lidar.edgedetection</em>,
+<em><a href="v.lidar.growing.html">v.lidar.growing</a></em>,
+<em><a href="v.lidar.correction.html">v.lidar.correction</a></em>)
+will be a point classification in four categories:
+
+<div class="code"><pre>
TERRAIN SINGLE PULSE (cat = 1, layer = 2)
-<br>
TERRAIN DOUBLE PULSE (cat = 2, layer = 2)
-<br>
OBJECT SINGLE PULSE (cat = 3, layer = 2)
-<br>
OBJECT DOUBLE PULSE (cat = 4, layer = 2)
+</pre></div>
-
<h2>EXAMPLES</h2>
<h3>Basic edge detection</h3>
+
<div class="code"><pre>
v.lidar.edgedetection input=vector_last output=edge ew_step=8 ns_step=8 lambda_g=0.5
</pre></div>
@@ -122,7 +119,27 @@
</em></p>
</center>
+<h2>REFERENCES</h2>
+<ul>
+<li>Antolin, R. et al., 2006. Digital terrain models determination by LiDAR
+technology: Po basin experimentation. Bolletino di Geodesia e Scienze
+Affini, anno LXV, n. 2, pp. 69-89.</li>
+<li>Brovelli M. A., Cannata M., Longoni U.M., 2004. LIDAR Data Filtering and
+DTM Interpolation Within GRASS, Transactions in GIS, April 2004, vol. 8,
+iss. 2, pp. 155-174(20), Blackwell Publishing Ltd.</li>
+<li>Brovelli M. A., Cannata M., 2004. Digital Terrain model reconstruction in
+urban areas from airborne laser scanning data: the method and an example
+for Pavia (Northern Italy). Computers and Geosciences 30 (2004) pp.325-331</li>
+<li>Brovelli M. A. and Longoni U.M., 2003. Software per il filtraggio di dati
+LIDAR, Rivista dell'Agenzia del Territorio, n. 3-2003, pp. 11-22 (ISSN 1593-2192).</li>
+<li>Brovelli M. A., Cannata M. and Longoni U.M., 2002. DTM LIDAR in area urbana,
+Bollettino SIFET N.2, pp. 7-26.</li>
+<li>Performances of the filter can be seen in the
+<a href="http://www.itc.nl/isprswgIII-3/filtertest/MainDoc.htm">ISPRS WG III/3 Comparison of Filters</a>
+report by Sithole, G. and Vosselman, G., 2003.</li>
+</ul>
+
<h2>SEE ALSO</h2>
<em>
@@ -134,8 +151,8 @@
<a href="v.in.ascii.html">v.in.ascii</a>
</em>
-
<h2>AUTHORS</h2>
+
Original version of program in GRASS 5.4:
<br>
Maria Antonia Brovelli, Massimiliano Cannata, Ulisse Longoni and Mirko Reguzzoni
@@ -144,35 +161,5 @@
<br>
Roberto Antolin and Gonzalo Moreno
-
-<h2>REFERENCES</h2>
-
-Antolin, R. et al., 2006. Digital terrain models determination by LiDAR
-technology: Po basin experimentation. Bolletino di Geodesia e Scienze
-Affini, anno LXV, n. 2, pp. 69-89.
-<br>
-<br>
-Brovelli M. A., Cannata M., Longoni U.M., 2004. LIDAR Data Filtering and
-DTM Interpolation Within GRASS, Transactions in GIS, April 2004, vol. 8,
-iss. 2, pp. 155-174(20), Blackwell Publishing Ltd.
-<br>
-<br>
-Brovelli M. A., Cannata M., 2004. Digital Terrain model reconstruction in
-urban areas from airborne laser scanning data: the method and an example
-for Pavia (Northern Italy). Computers and Geosciences 30 (2004) pp.325-331
-<br>
-<br>
-Brovelli M. A. and Longoni U.M., 2003. Software per il filtraggio di dati
-LIDAR, Rivista dell'Agenzia del Territorio, n. 3-2003, pp. 11-22 (ISSN 1593-2192).
-<br>
-<br>
-Brovelli M. A., Cannata M. and Longoni U.M., 2002. DTM LIDAR in area urbana,
-Bollettino SIFET N.2, pp. 7-26.
-<br>
-<br>
-Performances of the filter can be seen in the
-<a href="http://www.itc.nl/isprswgIII-3/filtertest/MainDoc.htm">ISPRS WG III/3 Comparison of Filters</a>
-report by Sithole, G. and Vosselman, G., 2003.
-
-<br>
-<p><i>Last changed: $Date$</i>
+<p>
+<i>Last changed: $Date$</i>
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