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<td><a href="index.html">Index</a></td>
<td><a href="introduction.html">Introduction</a></td>
<td><a href="contents.html">Contents</a></td>
<td><a href="install.html">Install</a></td>
<td><a href="dependencies.html">Dependencies</a></td>
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<td><a href="data.html">Data</a></td>
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<td><a href="stereo.html">Stereo</a></td>
<td><a href="osgdem.html">osgdem</a></td>
<td><a href="plan.html">Plan</a></td>
<td><a href="documentation.html">Reference Guides</a></td>
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<h2>
<a name="Using_osgdem"></a><u>Using osgdem to generate geospatial
terrain databases</u></h2>
<ol>
<li><a href="#Quick_step_by_step_guide:">Quick step by step guide</a></li>
<li><a href="#osgdem_options">osgdem options</a></li>
</ol>
<hr style="width: 100%; height: 2px;">
<h3><a name="Quick_step_by_step_guide:"></a>Quick step by step guide:</h3>
What follows are the steps required to get osgTerrain/osgdem compiling and
an example of how to use it to process imagery and DEM's to generate a
paged databases.<br>
<br>
1) Download, compile &amp; install GDAL. <br>
&nbsp;<br>
2) Get the latest OSG in CVS.<br>
<br>
3) For UNIX 'make' users, make a copy of Make/dependencies and change the
GDAL_INSTALL entry to:<br>
<br>
<div style="margin-left: 40px;"><span style="font-weight: bold;">set
GDAL_INSTALL = true </span><br>
<span style="font-weight: bold;"></span></div>
<span style="font-weight: bold;"><br>
&nbsp;&nbsp;&nbsp; </span>Then tell the build to use your custom
dependencies by setting the environmental variable OSG_DEPENDENCIES to
the absolute path to your file i.e.:<br>
<br>
<div style="margin-left: 40px;"><span style="font-weight: bold;">export
OSG_DEPENDENCIES=/home/billgates/my_osg_dependencies</span><br>
</div>
&nbsp;<br>
4) Rebuild the OSG &amp; install (if you haven't already).<br>
&nbsp;<br>
5) Oh, make sure you have a couple of GB of spare disk space,&nbsp; because
you're going to need it :-) <br>
&nbsp;<br>
6) Download some data, for this example I'm using the Puget Sound data
at: <br>
&nbsp;<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <a
href="http://www.cc.gatech.edu/projects/large_models/ps.html">http://www.cc.gatech.edu/projects/large_models/ps.html
</a><br>
&nbsp;<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Download Elevation Map:
16385 &times; 16385 PNG: 188MB <br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Download Texture Map:
16384 &times; 16384 PNG: 268MB &nbsp;<br>
<br>
7) To avoid aliasing artifacts when accessing data I use <a
href="http://www.remotesensing.org/gdal/gdal_utilities.html">GDAL
utilitiy
programs</a> to generate overviews (basically mip maps stored in the
.tiff format)
via: <br>
&nbsp;<br>
<br>
<div style="margin-left: 40px;"><span style="font-weight: bold;">gdal_translate
ps_height_16k.png
ps_height_16k.tif </span><br>
<span style="font-weight: bold;">gdaladdo -r average ps_height_16k.tif
2 4 8 16 32 </span><br style="font-weight: bold;">
<span style="font-weight: bold;">&nbsp;&nbsp; </span><br
style="font-weight: bold;">
<span style="font-weight: bold;">gdal_translate ps_texture_16k.png
ps_texture_16k.tif </span><br style="font-weight: bold;">
g<span style="font-weight: bold;">daladdo -r average ps_texture_16k.tif
2 4 8 16 32 </span><br style="font-weight: bold;">
</div>
<span style="font-weight: bold;">&nbsp;</span><br>
<br>
8) Now its time to run the osgdem example to generate your PagedLOD
database, the more levels you generate the longer it will take
(exponentially so). 'osgdem' is just a front end to osgTerrain::DataSet
where all the hard work happens. Here's what to run : <br>
<br>
<div style="margin-left: 40px;"><span style="font-weight: bold;">osgdem
--xx 10 --yy 10 -t ../ps_texture.tif \</span><br
style="font-weight: bold;">
<span style="font-weight: bold;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;
&nbsp; &nbsp;
--xx 10 --yy 10 -d ../ps_height.tif \</span><br
style="font-weight: bold;">
<span style="font-weight: bold;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;
-l 8 \</span><br style="font-weight: bold;">
<span style="font-weight: bold;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp; -v 0.1 \</span><br style="font-weight: bold;">
<span style="font-weight: bold;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
-o puget.ive</span><br>
</div>
<br>
Then go away for lunch, afternoon and tea, as generating this much data
takes a while... If you don't wish to wait for the full database then
reduce the number of levels it generates by setting the -l option to a
lower value such as 3.<br>
<br>
The command line options used above are: <br>
<div style="margin-left: 40px;">&nbsp;<br>
The first part the --xx and --yy is specifying the size of the pixels
in meters, since these png/tif don't have any geospatial data of their
own, if you have geospatialised files then you won't need this.<br>
<br>
The second part -t &lt;filename&gt; is the option for specificing the
texture maps to use, you can use as many times as you wish,
osgTerrain::DataSet will moziac them into a single database. &nbsp;<br>
<br>
The third part -d is the option for specifying the digital elevation
maps to use, as with the textures you can use as many as you like. <br>
&nbsp;<br>
The -l option specificies the maximum number of levels to generate. If
you use a large number then the database generation will stop once the
max resolution of your source data is matched by the resulting database.
The database generation will decend further where there is high res
source
data, decend less where there is lower res data. <br>
<br>
The -v option specifies the scaling factor which the height is
multiplied by.<br>
<br>
And finally the -o &lt;filename&gt; is the output format to generate the
databases in. This will be the name of the topmost file in the one you
should load. It can be a .ive or a .osg. The .ive is faster and has
embedded files.&nbsp;<br>
</div>
<br>
9) Time to play. Simply load the database in your app (make sure it
supports the osgDB::DatabasePager - see osgsimplepager
example for details). The standard osgviewer works just fine so,
here goes: <br>
&nbsp;<br>
&nbsp;&nbsp; <span style="font-weight: bold;">osgviewer output.ive </span><br>
&nbsp;<br>
<br>
10) You don't actually have to wait for osgdem to complete before you
can browse the database, since osgdem generates
the topmost tiles first. Its not totally robust since osgviewer can end
up
loading tiles that are still being written by osgdem, but it doesn't
crash
here under Linux, so you might be lucky too. <br>
<br>
11) If your imagery and DEMs have geospatial coords associated with
them then the -xx, --yy and -v options will not be required, making
it much simplier to specify - you just need to specifiy options such as
<span style="font-weight: bold;">-t imge.tif</span> and -d terran.dt0
without any need to set the coordinate system.<br>
<br>
12) osgdem can automatically handle mosaicing of sets of files. These
can be specified via a sequence of <span style="font-weight: bold;">-t
&lt;filename&gt;</span> and <span style="font-weight: bold;">-d
&lt;filename&gt;</span> pairs on the commandline, or via <span
style="font-weight: bold;">-t &lt;directoryname&gt;</span> and <span
style="font-weight: bold;">-d &lt;directoryname&gt;.</span><br>
&nbsp;<br>
<hr style="width: 100%; height: 2px;">
<h3><a name="osgdem_options"></a>osgdem options</h3>
There are of osgdem options to use, to list the full ranges of options
do:<br>
<br>
<div style="margin-left: 40px;"><span style="font-weight: bold;">osgdem
--help</span><br>
</div>
<br>
And you should see:<br>
<br>
<div style="margin-left: 40px;"><br>
<span style="font-family: monospace; font-weight: bold;">osgdem --help</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">Usage: osgdem [options] filename
...</span><br style="font-family: monospace;">
<span style="font-family: monospace;">Options:</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;
--HEIGHT_FIELD&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Create a height field database</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;
--LOD&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Create a LOD'd database</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;
--POLYGONAL&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Create a height field database</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;
--PagedLOD&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Create a PagedLOD'd database</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;
--RGB-16&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Use 16bit RGB destination imagery</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;
--RGB-24&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Use 24bit RGB destination imagery</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;
--comment&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Added a comment/description string to</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
the top most node in the dataset</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;
--compressed&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Use OpenGL compression on destination</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
imagery</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp; --cs &lt;coordinates
system string&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Set the
coordinates system of source</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
imagery, DEM or destination database.</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
The string may be any of the usual</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
GDAL/OGR forms, complete WKT, PROJ.4,</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
EPS</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;
--max-anisotropy&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Max anisotropy level to use when</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
texturing, defaults to 1.0.</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;
--max-visible-distance-of-top-level&nbsp;&nbsp;&nbsp;&nbsp; Set the
maximum visible distance that</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
the top most tile can be viewed at</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;
--mip-mapping-hardware&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Use mip mapped textures, and generate</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
the mipmaps in hardware when</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
available.</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;
--mip-mapping-imagery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Use mip mapped textures, and generate</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
the mipmaps in imagery.</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;
--no-mip-mapping&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Disable mip mapping of textures</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;
--radius-to-max-visible-distance-ratio&nbsp; Set the maximum visible
distance ratio</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
for all tiles apart from the top most</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
tile. The maximum visuble distance is</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
computed from the ratio * tile radius.</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp; --skirt-ratio
&lt;float&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Set the ratio of skirt height to tile</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
size</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;
--tile-image-size&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Set the tile maximum image size</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;
--tile-terrain-size&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Set the tile maximum terrain size</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp; --wkt &lt;WKT
string&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Set the coordinates system of source</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
imagery, DEM or destination database</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
in WellKownText form.</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp; --wkt-file &lt;WKT
file&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Set the coordinates system of source</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
imagery, DEM or destination database</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
by as file containing WellKownText</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
definition.</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp; -d
&lt;filename&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Specify the digital elevation map</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
input file to process</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp; -e &lt;x&gt; &lt;y&gt;
&lt;w&gt;
&lt;h&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Extents of the model to generate</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp; -h or
--help&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Display this information</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp; -l
&lt;numOfLevels&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Specify the number of PagedLOD levels</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
to generate</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp; -m
&lt;filename&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Specify the 3D database model input</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
file to process</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp; -o
&lt;outputfile&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Specify the output master file to</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
generate</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp; -t
&lt;filename&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Specify the texture map input file to</span><br
style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
process</span><br style="font-family: monospace;">
<span style="font-family: monospace;">&nbsp;
-v&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Set the vertical multiplier</span><br style="font-family: monospace;">
<br style="font-family: monospace;">
<br>
</div>
</body>
</html>