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<li class="toctree-l3"><a class="reference internal" href="../build-overviews/#example-images">Example Images</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="../camera-lens/#why-would-one-use-a-particular-camera-lens-model">Why would one use a particular Camera Lens Model?</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../camera-lens/#auto-rectilinear-data"><code class="docutils literal notranslate"><span class="pre">auto</span></code> : Rectilinear Data</a></li>
<li class="toctree-l4"><a class="reference internal" href="../camera-lens/#brown-rectilinear-data"><code class="docutils literal notranslate"><span class="pre">brown</span></code> : Rectilinear Data</a></li>
<li class="toctree-l4"><a class="reference internal" href="../camera-lens/#fisheye-rectilinear-data"><code class="docutils literal notranslate"><span class="pre">fisheye</span></code> : Rectilinear Data</a></li>
<li class="toctree-l4"><a class="reference internal" href="../camera-lens/#perspective-rectilinear-data"><code class="docutils literal notranslate"><span class="pre">perspective</span></code> : Rectilinear Data</a></li>
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<li class="toctree-l2 current"><a class="current reference internal" href="#">cog</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../gcp/">gcp</a></li>
<li class="toctree-l2"><a class="reference internal" href="../geo/">geo</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../ignore-gsd/">ignore-gsd</a></li>
<li class="toctree-l2"><a class="reference internal" href="../matcher-distance/">matcher-distance</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../orthophoto-compression/">orthophoto-compression</a></li>
<li class="toctree-l2"><a class="reference internal" href="../orthophoto-cutline/">orthophoto-cutline</a></li>
<li class="toctree-l2"><a class="reference internal" href="../orthophoto-kmz/">orthophoto-kmz</a></li>
<li class="toctree-l2"><a class="reference internal" href="../orthophoto-no-tiled/">orthophoto-no-tiled</a></li>
<li class="toctree-l2"><a class="reference internal" href="../orthophoto-png/">orthophoto-png</a></li>
<li class="toctree-l2"><a class="reference internal" href="../orthophoto-resolution/">orthophoto-resolution</a></li>
<li class="toctree-l2"><a class="reference internal" href="../pc-classify/">pc-classify</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../project-path/">project-path</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../skip-3dmodel/">skip-3dmodel</a></li>
<li class="toctree-l2"><a class="reference internal" href="../skip-band-alignment/">skip-band-alignment</a></li>
<li class="toctree-l2"><a class="reference internal" href="../skip-report/">skip-report</a></li>
<li class="toctree-l2"><a class="reference internal" href="../sm-cluster/">sm-cluster</a></li>
<li class="toctree-l2"><a class="reference internal" href="../smrf-scalar/">smrf-scalar</a></li>
<li class="toctree-l2"><a class="reference internal" href="../smrf-slope/">smrf-slope</a></li>
<li class="toctree-l2"><a class="reference internal" href="../smrf-threshold/">smrf-threshold</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../split/">split</a></li>
<li class="toctree-l2"><a class="reference internal" href="../split-image-groups/">split-image-groups</a></li>
<li class="toctree-l2"><a class="reference internal" href="../split-overlap/">split-overlap</a></li>
<li class="toctree-l2"><a class="reference internal" href="../texturing-data-term/">texturing-data-term</a></li>
<li class="toctree-l2"><a class="reference internal" href="../texturing-keep-unseen-faces/">texturing-keep-unseen-faces</a></li>
<li class="toctree-l2"><a class="reference internal" href="../texturing-outlier-removal-type/">texturing-outlier-removal-type</a></li>
<li class="toctree-l2"><a class="reference internal" href="../texturing-skip-global-seam-leveling/">texturing-skip-global-seam-leveling</a></li>
<li class="toctree-l2"><a class="reference internal" href="../texturing-skip-local-seam-leveling/">texturing-skip-local-seam-leveling</a></li>
<li class="toctree-l2"><a class="reference internal" href="../texturing-tone-mapping/">texturing-tone-mapping</a></li>
<li class="toctree-l2"><a class="reference internal" href="../tiles/">tiles</a></li>
<li class="toctree-l2"><a class="reference internal" href="../time/">time</a></li>
<li class="toctree-l2"><a class="reference internal" href="../use-3dmesh/">use-3dmesh</a></li>
<li class="toctree-l2"><a class="reference internal" href="../use-exif/">use-exif</a></li>
<li class="toctree-l2"><a class="reference internal" href="../use-fixed-camera-params/">use-fixed-camera-params</a></li>
<li class="toctree-l2"><a class="reference internal" href="../use-hybrid-bundle-adjustment/">use-hybrid-bundle-adjustment</a></li>
<li class="toctree-l2"><a class="reference internal" href="../verbose/">verbose</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../../outputs/">مخرجات OpenDroneMap</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../../outputs/#point-cloud">سحابة نقطة</a></li>
<li class="toctree-l2"><a class="reference internal" href="../../outputs/#d-textured-model">نموذج محكم ثلاثي الأبعاد</a></li>
<li class="toctree-l2"><a class="reference internal" href="../../outputs/#orthophoto">Orthophoto</a></li>
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<section id="cog">
<span id="id1"></span><h1>cog<a class="headerlink" href="#cog" title="Permalink to this headline"></a></h1>
<p>Create Cloud-Optimized GeoTIFFs instead of normal GeoTIFFs. Default: <code class="docutils literal notranslate"><span class="pre">False</span></code></p>
<div class="line-block">
<div class="line">Parameter Type:</div>
<div class="line-block">
<div class="line"><strong>Boolean</strong></div>
</div>
<div class="line">Parameter Domain:</div>
<div class="line-block">
<div class="line">True: <code class="docutils literal notranslate"><span class="pre">--cog</span></code></div>
<div class="line">False: <code class="docutils literal notranslate"><span class="pre">null</span></code></div>
</div>
<div class="line">Parameter Default:</div>
<div class="line-block">
<div class="line">False: <code class="docutils literal notranslate"><span class="pre">null</span></code></div>
</div>
</div>
<hr class="docutils" />
<table class="docutils align-default">
<colgroup>
<col style="width: 40%" />
<col style="width: 60%" />
</colgroup>
<thead>
<tr class="row-odd"><th class="head"><p>Resource</p></th>
<th class="head"><p>Impact</p></th>
</tr>
</thead>
<tbody>
<tr class="row-even"><td><p>CPU</p></td>
<td><p>●●○ | Medium</p></td>
</tr>
<tr class="row-odd"><td><p>GPU</p></td>
<td><p>○○○ | None</p></td>
</tr>
<tr class="row-even"><td><p>HDD</p></td>
<td><p>●●○ | Medium</p></td>
</tr>
<tr class="row-odd"><td><p>RAM</p></td>
<td><p>●●○ | Medium</p></td>
</tr>
<tr class="row-even"><td><p>Time</p></td>
<td><p>●●○ | Medium</p></td>
</tr>
</tbody>
</table>
<hr class="docutils" />
<section id="what-are-cloud-optimized-geotiffs-cogs">
<h2>What Are Cloud Optimized GeoTIFFs (COGs)?<a class="headerlink" href="#what-are-cloud-optimized-geotiffs-cogs" title="Permalink to this headline"></a></h2>
<p>Cloud Optimized GeoTIFFs (COGs hereafter) are a special formulation of GeoTIFF files that take advantage of internal overivews as well as tiling (and various forms of compression).</p>
<p>In the case of WebODM, all GeoTIFFs will be generated as COGs because the 2D Map View uses the special attributes of COGs to enable rapid display and preview of the data generated by WebODM.</p>
</section>
<section id="when-are-cogs-appropriate">
<h2>When are COGs appropriate?<a class="headerlink" href="#when-are-cogs-appropriate" title="Permalink to this headline"></a></h2>
<p>COGs are most appropriate when the GeoTIFF is going to be hosted online and/or accessed by a program which can take advantage of HTTP GetRange Requests and/or internal overviews and tiles.</p>
</section>
<section id="why-would-one-use-cogs">
<h2>Why would one use COGs?<a class="headerlink" href="#why-would-one-use-cogs" title="Permalink to this headline"></a></h2>
<p>The COG structure (internal overviews and tiling) allows for rapid viewing of the data in programs which are capable of reading tiled data and overviews (most GIS software [QGIS etc]). This advantage holds true whether or not the file is hosted online and served via HTTP or whether it is stored locally.</p>
<p>With these features in place, a COG should display much more quickly in a given application than a more legacy formatted GeoTIFF with no overviews and striped structure.</p>
</section>
<section id="example-images">
<h2>Example Images<a class="headerlink" href="#example-images" title="Permalink to this headline"></a></h2>
<section id="true-cog">
<h3>True: <code class="docutils literal notranslate"><span class="pre">--cog</span></code><a class="headerlink" href="#true-cog" title="Permalink to this headline"></a></h3>
<figure class="align-default" id="id2">
<img alt="GDAL Info showing LAYOUT=COG" src="https://user-images.githubusercontent.com/19295950/127079824-c85fa5a9-842a-4f28-a380-b6404aac7ef2.png" />
<figcaption>
<p><span class="caption-text">The Raster Information tool in QGIS can print information from gdalinfo which can be used to confirm the conformance of a GeoTIFF to the COG spec.</span><a class="headerlink" href="#id2" title="Permalink to this image"></a></p>
</figcaption>
</figure>
<figure class="align-default" id="id3">
<img alt="QGIS Layer Properties showing Internal Overviews" src="https://user-images.githubusercontent.com/19295950/138731905-d10483bd-b91b-4f63-bfb4-89c0f50bf74b.png" />
<figcaption>
<p><span class="caption-text">The Layer Properties panel can show that there are in fact internal overviews. Keep in mind that not every GeoTIFF has internal overviews, but every COG must.</span><a class="headerlink" href="#id3" title="Permalink to this image"></a></p>
</figcaption>
</figure>
<figure class="align-default" id="id4">
<img alt="QGIS Layer Properties showing an on-disk file size of 8.78 MB" src="https://user-images.githubusercontent.com/19295950/138733095-fb5f07ef-fbb0-48f4-8401-25cbf5294b9d.png" />
<figcaption>
<p><span class="caption-text">Note that the on-disk file size is 8.78 MB for the COG due to the presence of internal overviews when compared to the 6.30 MB of the non-COG GeoTIFF below.</span><a class="headerlink" href="#id4" title="Permalink to this image"></a></p>
</figcaption>
</figure>
</section>
<section id="false-null">
<h3>False: <code class="docutils literal notranslate"><span class="pre">null</span></code><a class="headerlink" href="#false-null" title="Permalink to this headline"></a></h3>
<figure class="align-default" id="id5">
<img alt="GDAL Info not showing LAYOUT=COG" src="https://user-images.githubusercontent.com/19295950/127080115-7e09ba30-140f-402d-b00a-8bb0c7bc72ff.png" />
<figcaption>
<p><span class="caption-text">The Raster Information tool in QGIS does not show LAYOUT=COG, which indicates that this GeoTIFF does not meet the COG spec.</span><a class="headerlink" href="#id5" title="Permalink to this image"></a></p>
</figcaption>
</figure>
<figure class="align-default" id="id6">
<img alt="QGIS Layer Properties not showing Internal Overviews" src="https://user-images.githubusercontent.com/19295950/138732051-d227c98d-10a5-46de-ac99-8c5ffb0a12b2.png" />
<figcaption>
<p><span class="caption-text">The Layer Properties panel shows that the GeoTIFF lacks all levels of Internal Pyramids.</span><a class="headerlink" href="#id6" title="Permalink to this image"></a></p>
</figcaption>
</figure>
<figure class="align-default" id="id7">
<img alt="QGIS Layer Properties showing an on-disk file size of 6.30 MB" src="https://user-images.githubusercontent.com/19295950/138733132-a9c4f8b4-673a-426b-a665-bde5e89e4de3.png" />
<figcaption>
<p><span class="caption-text">Note that the on-disk file size is 6.30 MB for the COG due to the lack of internal overviews when compared to the 8.78 MB of the COG GeoTIFF above.</span><a class="headerlink" href="#id7" title="Permalink to this image"></a></p>
</figcaption>
</figure>
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