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166  <div class="section" id="optional-saga-gis-support">
167<span id="kernel-sagagis"></span><h1>Optional SAGA GIS support<a class="headerlink" href="#optional-saga-gis-support" title="Permalink to this headline"></a></h1>
168<p><a class="reference external" href="http://orfeo-toolbox.org/otb/">SAGA GIS</a> provides a comprehensive set of geoscientific methods and spatial algorithms. The optional SAGA GIS support is available since <a class="reference external" href="http://zoo-project.org">ZOO-Project 1.5</a>. It allows to execute the <a class="reference external" href="http://www.saga-gis.org/saga_module_doc/2.1.4/index.html">SAGA Modules</a> directly as ZOO WPS Services thanks to a <a class="reference internal" href="index.html#kernel-index"><span>ZOO-Kernel</span></a> specific internal mechanism which is detailed in this section.</p>
169<div class="admonition note">
170<p class="first admonition-title">Note</p>
171<p class="last"><a class="reference internal" href="../_images/sagagis.png"><img alt="SAGA GIS logo" src="../_images/sagagis.png" style="width: 45.0px; height: 45.0px;" /></a> <a class="reference external" href="https://www.orfeo-toolbox.org">SAGA GIS</a> is the System for Automated Geoscientific Analyses. Learn more on official <a class="reference external" href="http://www.saga-gis.org/en/index.html">website</a>.</p>
172</div>
173<div class="section" id="how-does-it-work">
174<h2>How does it work ?<a class="headerlink" href="#how-does-it-work" title="Permalink to this headline"></a></h2>
175</div>
176<div class="section" id="installation-and-configuration">
177<h2>Installation and configuration<a class="headerlink" href="#installation-and-configuration" title="Permalink to this headline"></a></h2>
178<p>Follow the step described bellow in order to activate the ZOO-Project optional SAGA GIS support.</p>
179<div class="section" id="prerequisites">
180<h3>Prerequisites<a class="headerlink" href="#prerequisites" title="Permalink to this headline"></a></h3>
181<blockquote>
182<div><ul class="simple">
183<li>latest <a class="reference external" href="http://zoo-project.org/trac/browser/trunk/zoo-project/zoo-kernel">ZOO-Kernel</a> trunk version</li>
184<li>SAGA GIS (<a class="reference external" href="http://saga-gis.org">SAGA-GIS 2.1.4</a> )</li>
185<li>libLAS-1.2 (<a class="reference external" href="https://github.com/libLAS/libLAS-1.2">LibLAS-1.2</a> )</li>
186</ul>
187</div></blockquote>
188</div>
189<div class="section" id="installation-steps">
190<h3>Installation steps<a class="headerlink" href="#installation-steps" title="Permalink to this headline"></a></h3>
191<div class="admonition note">
192<p class="first admonition-title">Note</p>
193<p class="last">These installation steps were successfully tested on Ubuntu 14.4 LTS</p>
194</div>
195<p>Download lastest ZOO-Kernel code from SVN.</p>
196<div class="highlight-guess"><div class="highlight"><pre>svn checkout http://svn.zoo-project.org/svn/trunk/zoo-kernel zoo-kernel
197</pre></div>
198</div>
199<p>Then compile ZOO-Kernel using the needed configuration options as shown bellow:</p>
200<div class="highlight-guess"><div class="highlight"><pre>cd zoo-kernel
201autoconf
202./configure  --with-saga=/usr/local/
203make
204</pre></div>
205</div>
206<p>And copy the newly created zoo_loader.cgi to <code class="docutils literal"><span class="pre">/usr/lib/cgi-bin</span></code> :</p>
207<div class="highlight-guess"><div class="highlight"><pre>cp zoo_loader.cgi /usr/lib/cgi-bin
208</pre></div>
209</div>
210<div class="section" id="configuration-steps">
211<h4>Configuration steps<a class="headerlink" href="#configuration-steps" title="Permalink to this headline"></a></h4>
212<div class="section" id="main-configuration-file">
213<h5>Main configuration file<a class="headerlink" href="#main-configuration-file" title="Permalink to this headline"></a></h5>
214<p>Add the following content to your <code class="docutils literal"><span class="pre">/usr/lib/cgi-bin/main.cfg</span></code> file
215in the <code class="docutils literal"><span class="pre">[env]</span></code> section:</p>
216<div class="highlight-guess"><div class="highlight"><pre>ITK_AUTOLOAD_PATH=/usr/local/lib/otb/applications
217</pre></div>
218</div>
219</div>
220<div class="section" id="services-configuration-file">
221<h5>Services configuration file<a class="headerlink" href="#services-configuration-file" title="Permalink to this headline"></a></h5>
222<p>The build of the <a class="reference external" href="http://zoo-project.org/trac/browser/trunk/thirds/otb2zcfg">otb2zcfg</a> utility is required to activate the available OTB Applications as WPS services. This can be done using the following command:</p>
223<div class="highlight-guess"><div class="highlight"><pre>mkdir build
224cd build
225ccmake ..
226make
227</pre></div>
228</div>
229<p>Run the following command to generate all the needed zcfg files for the available OTB Application:</p>
230<div class="highlight-guess"><div class="highlight"><pre>mkdir zcfgs
231cd zcfgs
232export ITK_AUTOLOAD_PATH=/your/path/to/otb/applications
233../build/otb2zcfg
234mkdir /location/to/your/cgi-bin/OTB
235cp *zcfg /location/to/your/cgi-bin/OTB
236</pre></div>
237</div>
238</div>
239<div class="section" id="test-the-zoo-saga-support">
240<h5>Test the ZOO SAGA support<a class="headerlink" href="#test-the-zoo-saga-support" title="Permalink to this headline"></a></h5>
241<p>Once done, OTB Applications should be listed as available WPS Services when runing a GetCapabilities request</p>
242<div class="highlight-guess"><div class="highlight"><pre>http://localhost/cgi-bin/zoo_loader.cgi?request=GetCapabilities&amp;service=WPS
243</pre></div>
244</div>
245<p>Each OTB Service can then be described individually using the DescribeProcess request, as for example:</p>
246<div class="highlight-guess"><div class="highlight"><pre>http://localhost/cgi-bin/zoo_loader.cgi?request=DescribeProcess&amp;service=WPS&amp;version=1.0.0&amp;Identifier=OTB.BandMath
247</pre></div>
248</div>
249<p>And executed according to your needs, as for the following example executing OTB.BandMath with the OTB sample data as input</p>
250<div class="highlight-guess"><div class="highlight"><pre><span class="nt">http</span><span class="o">://</span><span class="nt">localhost</span><span class="o">/</span><span class="nt">cgi-bin</span><span class="o">/</span><span class="nt">zoo_loader</span><span class="nc">.cgi</span><span class="o">?</span><span class="nt">request</span><span class="o">=</span><span class="nt">Execute</span><span class="o">&amp;</span><span class="nt">service</span><span class="o">=</span><span class="nt">WPS</span><span class="o">&amp;</span><span class="nt">version</span><span class="o">=</span><span class="nt">1</span><span class="nc">.0.0</span><span class="o">&amp;</span><span class="nt">Identifier</span><span class="o">=</span><span class="nt">OTB</span><span class="nc">.BandMath</span><span class="o">&amp;</span><span class="nt">DataInputs</span><span class="o">=</span><span class="nt">il</span><span class="o">=</span><span class="nt">Reference</span><span class="k">@xlink</span><span class="nd">:href</span><span class="o">=</span><span class="nt">http</span><span class="o">://</span><span class="nt">hg</span><span class="nc">.orfeo-toolbox.org</span><span class="o">/</span><span class="nt">OTB-Data</span><span class="o">/</span><span class="nt">raw-file</span><span class="o">/</span><span class="nt">ca154074b282</span><span class="o">/</span><span class="nt">Examples</span><span class="o">/</span><span class="nt">verySmallFSATSW</span><span class="nc">.tif</span><span class="p">;</span><span class="nt">il</span><span class="o">=</span><span class="nt">Reference</span><span class="k">@xlink</span><span class="nd">:href</span><span class="o">=</span><span class="nt">http</span><span class="o">://</span><span class="nt">hg</span><span class="nc">.orfeo-toolbox.org</span><span class="o">/</span><span class="nt">OTB-Data</span><span class="o">/</span><span class="nt">raw-file</span><span class="o">/</span><span class="nt">ca154074b282</span><span class="o">/</span><span class="nt">Examples</span><span class="o">/</span><span class="nt">verySmallFSATSW_nir</span><span class="nc">.tif</span><span class="p">;</span><span class="nt">out</span><span class="o">=</span><span class="nt">float</span><span class="o">;</span><span class="nt">exp</span><span class="o">=</span><span class="nt">im1b3</span><span class="o">*</span><span class="nt">cos</span><span class="o">%</span><span class="nt">28im1b1</span><span class="o">%</span><span class="nt">29</span><span class="o">,</span><span class="nt">im1b2</span><span class="o">*</span><span class="nt">cos</span><span class="o">%</span><span class="nt">28im1b1</span><span class="o">%</span><span class="nt">29</span><span class="o">,</span><span class="nt">im1b1</span><span class="o">*</span><span class="nt">cos</span><span class="o">%</span><span class="nt">28im1b1</span><span class="o">%</span><span class="nt">29</span><span class="o">&amp;</span><span class="nt">RawDataOutput</span><span class="o">=</span><span class="nt">out</span><span class="k">@mimeType</span><span class="o">=</span><span class="nt">image</span><span class="o">/</span><span class="nt">png</span>
251</pre></div>
252</div>
253<p>When executing OTB applications as WPS Services, it is also possible to check the OTB process status, using the usual ZOO GetStatus request.</p>
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