/usr/share/doc/grass-doc/html/v.extrude.html is in grass-doc 6.4.3-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 | <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>GRASS GIS manual: v.extrude</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<link rel="stylesheet" href="grassdocs.css" type="text/css">
</head>
<body bgcolor="white">
<img src="grass_logo.png" alt="GRASS logo"><hr align=center size=6 noshade>
<h2>NAME</h2>
<em><b>v.extrude</b></em> - Extrudes flat vector object to 3D with defined height.
<h2>KEYWORDS</h2>
vector, geometry, 3D
<h2>SYNOPSIS</h2>
<b>v.extrude</b><br>
<b>v.extrude help</b><br>
<b>v.extrude</b> [-<b>t</b>] <b>input</b>=<em>name</em> <b>output</b>=<em>name</em> [<b>zshift</b>=<em>float</em>] [<b>elevation</b>=<em>name</em>] [<b>height</b>=<em>float</em>] [<b>hcolumn</b>=<em>name</em>] [<b>type</b>=<em>string</em>[,<i>string</i>,...]] [<b>layer</b>=<em>integer</em>] [--<b>overwrite</b>] [--<b>verbose</b>] [--<b>quiet</b>]
<h3>Flags:</h3>
<DL>
<DT><b>-t</b></DT>
<DD>Trace elevation</DD>
<DT><b>--overwrite</b></DT>
<DD>Allow output files to overwrite existing files</DD>
<DT><b>--verbose</b></DT>
<DD>Verbose module output</DD>
<DT><b>--quiet</b></DT>
<DD>Quiet module output</DD>
</DL>
<h3>Parameters:</h3>
<DL>
<DT><b>input</b>=<em>name</em></DT>
<DD>Name of input 2D vector map</DD>
<DT><b>output</b>=<em>name</em></DT>
<DD>Name of resulting 3D vector map</DD>
<DT><b>zshift</b>=<em>float</em></DT>
<DD>Shifting value for z coordinates</DD>
<DD>Default: <em>0</em></DD>
<DT><b>elevation</b>=<em>name</em></DT>
<DD>Elevation raster for height extraction</DD>
<DT><b>height</b>=<em>float</em></DT>
<DD>Fixed height for 3D vector objects</DD>
<DT><b>hcolumn</b>=<em>name</em></DT>
<DD>Name of attribute column with object heights</DD>
<DT><b>type</b>=<em>string[,<i>string</i>,...]</em></DT>
<DD>Feature type</DD>
<DD>Options: <em>point,line,boundary,area</em></DD>
<DD>Default: <em>point,line,boundary,area</em></DD>
<DT><b>layer</b>=<em>integer</em></DT>
<DD>Layer number</DD>
<DD>A single vector map can be connected to multiple database tables. This number determines which table to use.</DD>
<DD>Default: <em>1</em></DD>
</DL>
<h2>DESCRIPTION</h2>
<p>
<em>v.extrude</em> creates faces, kernels, volumes or 3D lines based
on 2D vector objects, i.e. points become 3D vertical lines, lines to
3D lines, boundaries to faces and areas to volumes (composition of
faces and kernel).
<p>
If the flag <b>-t</b> is used then 3D vector objects follow the
elevation model by using individual elevation values for the vertices
and nodes. This can be useful for models of large objects (forest
stands).
<h2>EXAMPLES</h2>
<h3>3D houses with fixed height</h3>
<div class="code"><pre>
v.extrude input=houses output=houses3D height=5 type=area
</pre></div>
<h3>3D houses with individual height</h3>
<div class="code"><pre>
v.extrude input=houses output=houses3D elevation=dem hcolumn=height type=area
</pre></div>
<h3>Convert 2D lines to 3D with fixed height</h3>
<div class="code"><pre>
v.extrude input=lines output=lines3D elevation=dem height=0 type=line
</pre></div>
<h2>SEE ALSO</h2>
<em>
<a href="nviz.html">nviz</a>
</em>
<h2>AUTHOR</h2>
Jachym Cepicky,<br>
Updated by Martin Landa, FBK-irst, Italy
<p>
<i>Last changed: $Date: 2008-02-28 15:33:29 -0800 (Thu, 28 Feb 2008) $</i>
<HR>
<P><a href="index.html">Main index</a> - <a href="vector.html">vector index</a> - <a href="full_index.html">Full index</a></P>
<P>© 2003-2013 <a href="http://grass.osgeo.org">GRASS Development Team</a></p>
</body>
</html>
|