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<li class="toctree-l1"><a class="reference internal" href="../installation/">Instalasyon at Paano Simulan</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../installation/#hardware-recommendations">Hardware Recommendations</a></li>
<li class="toctree-l2"><a class="reference internal" href="../installation/#installation">Installation</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../installation/#windows">Windows</a><ul>
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<li class="toctree-l4"><a class="reference internal" href="../installation/#id2">Step 2. Install Requirements</a></li>
<li class="toctree-l4"><a class="reference internal" href="../installation/#id3">Step 3. I-check ang Memory at CPU Allocation</a></li>
<li class="toctree-l4"><a class="reference internal" href="../installation/#step-4-download-and-launch-webodm">Step 4. I-download at i-launch ang WebODM</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../installation/#running-on-more-than-one-machine">Pagpapatakbo sa dalawa o mas marami pang machine</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../tutorials/#creating-high-quality-orthophotos">Paglikha ng Mataas na Kalidad ng Orthophotos</a></li>
<li class="toctree-l2"><a class="reference internal" href="../tutorials/#calibrating-the-camera">Pag-kalibrate ng Camera</a></li>
<li class="toctree-l2"><a class="reference internal" href="../tutorials/#creating-digital-elevation-models">Paglikha ng Digital Elevation Models</a></li>
<li class="toctree-l2"><a class="reference internal" href="../tutorials/#measuring-stockpile-volume">Measuring stockpile volume</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../tutorials/#fieldwork-planning">Fieldwork planning</a></li>
<li class="toctree-l3"><a class="reference internal" href="../tutorials/#flight-pattern">Flight pattern</a></li>
<li class="toctree-l3"><a class="reference internal" href="../tutorials/#flight-height">Flight height</a></li>
<li class="toctree-l3"><a class="reference internal" href="../tutorials/#gcps">GCPs</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../tutorials/#measuring">Measuring</a></li>
<li class="toctree-l3"><a class="reference internal" href="../tutorials/#expected-accuracy">Expected accuracy</a></li>
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<li class="toctree-l3"><a class="reference internal" href="../tutorials/#listing-docker-machines">Listing Docker Machines</a></li>
<li class="toctree-l3"><a class="reference internal" href="../tutorials/#accessing-logs-on-the-instance">Accessing logs on the instance</a></li>
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<li class="toctree-l4"><a class="reference internal" href="../tutorials/#resize-droplet-pull-pin-run-away">I-resize ang droplet, hatakin ang pin at i-proseso ito.</a></li>
<li class="toctree-l4"><a class="reference internal" href="../tutorials/#after-it-finishes-assuming-you-survive-that-long">Matapos ang lahat (assuming na ikaw ay nagsurvive ng ganoon katagal)</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../arguments/">Mga Opsyon at Tanda</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../arguments/build-overviews/">build-overviews</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/camera-lens/">camera-lens</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/cameras/">cameras</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/cog/">cog</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/copy-to/">copy-to</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/crop/">crop</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/debug/">debug</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/dem-decimation/">dem-decimation</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/dem-euclidean-map/">dem-euclidean-map</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/dem-gapfill-steps/">dem-gapfill-steps</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/dem-resolution/">dem-resolution</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/depthmap-resolution/">depthmap-resolution</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/dsm/">dsm</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/dtm/">dtm</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/end-with/">end-with</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/fast-orthophoto/">fast-orthophoto</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/feature-quality/">feature-quality</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/feature-type/">feature-type</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/force-gps/">force-gps</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/gcp/">gcp</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/geo/">geo</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/gps-accuracy/">gps-accuracy</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/help/">help</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/ignore-gsd/">ignore-gsd</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/matcher-distance/">matcher-distance</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/matcher-neighbors/">matcher-neighbors</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/matcher-type/">matcher-type</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/max-concurrency/">max-concurrency</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/merge/">merge</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/mesh-octree-depth/">mesh-octree-depth</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/mesh-size/">mesh-size</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/min-num-features/">min-num-features</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/name/">name</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/optimize-disk-space/">optimize-disk-space</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/orthophoto-compression/">orthophoto-compression</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/orthophoto-cutline/">orthophoto-cutline</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/orthophoto-kmz/">orthophoto-kmz</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/orthophoto-no-tiled/">orthophoto-no-tiled</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/orthophoto-png/">orthophoto-png</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/orthophoto-resolution/">orthophoto-resolution</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/pc-classify/">pc-classify</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/pc-csv/">pc-csv</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/pc-ept/">pc-ept</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/pc-filter/">pc-filter</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/pc-geometric/">pc-geometric</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/pc-las/">pc-las</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/pc-quality/">pc-quality</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/pc-rectify/">pc-rectify</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/pc-sample/">pc-sample</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/pc-tile/">pc-tile</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/primary-band/">primary-band</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/project-path/">project-path</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/radiometric-calibration/">radiometric-calibration</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/rerun/">rerun</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/rerun-all/">rerun-all</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/rerun-from/">rerun-from</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/resize-to/">resize-to</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/skip-3dmodel/">skip-3dmodel</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/skip-band-alignment/">skip-band-alignment</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/skip-report/">skip-report</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/sm-cluster/">sm-cluster</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/smrf-scalar/">smrf-scalar</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/smrf-slope/">smrf-slope</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/smrf-threshold/">smrf-threshold</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/smrf-window/">smrf-window</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/split/">split</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/split-image-groups/">split-image-groups</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/split-overlap/">split-overlap</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/texturing-data-term/">texturing-data-term</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/texturing-keep-unseen-faces/">texturing-keep-unseen-faces</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/texturing-outlier-removal-type/">texturing-outlier-removal-type</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/texturing-skip-global-seam-leveling/">texturing-skip-global-seam-leveling</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/texturing-skip-local-seam-leveling/">texturing-skip-local-seam-leveling</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/texturing-tone-mapping/">texturing-tone-mapping</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/tiles/">tiles</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/time/">time</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/use-3dmesh/">use-3dmesh</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/use-exif/">use-exif</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/use-fixed-camera-params/">use-fixed-camera-params</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/use-hybrid-bundle-adjustment/">use-hybrid-bundle-adjustment</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/verbose/">verbose</a></li>
<li class="toctree-l2"><a class="reference internal" href="../arguments/version/">version</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="../outputs/">OpenDroneMap Outputs</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../outputs/#point-cloud">Point Cloud</a></li>
<li class="toctree-l2"><a class="reference internal" href="../outputs/#d-textured-model">3D Textured Model</a></li>
<li class="toctree-l2"><a class="reference internal" href="../outputs/#orthophoto">Orthophoto</a></li>
<li class="toctree-l2"><a class="reference internal" href="../outputs/#dtm-dsm">DTM/DSM</a></li>
<li class="toctree-l2"><a class="reference internal" href="../outputs/#list-of-all-outputs">Listahan ng mga output</a></li>
</ul>
</li>
<li class="toctree-l1 current"><a class="current reference internal" href="#">Ground Control Points</a><ul>
<li class="toctree-l2"><a class="reference internal" href="#recommended-practices-for-gcp-setting">Mga nirerekumendang gawi para sa paglagay ng GCP</a></li>
<li class="toctree-l2"><a class="reference internal" href="#gcp-file-format">GCP file format</a></li>
<li class="toctree-l2"><a class="reference internal" href="#user-interfaces">User Interfaces</a><ul>
<li class="toctree-l3"><a class="reference internal" href="#id1">POSM GCPi</a></li>
<li class="toctree-l3"><a class="reference internal" href="#id2">GCP Editor Pro</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="#references">References</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="../map-accuracy/">Kawastuan ng Mapa</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../map-accuracy/#what-to-expect">Mga Dapat I-expect</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../map-accuracy/#aspects-impacting-map-accuracy">Mga aspeto na may impact sa map accuracy</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../map-accuracy/#references">Mga Sanggunian</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="../geo/">Image Geolocation Files</a></li>
<li class="toctree-l1"><a class="reference internal" href="../masks/">Gamit ang Image Masks</a></li>
<li class="toctree-l1"><a class="reference internal" href="../large/">Splitting Large Datasets</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../large/#calibrate-images">Calibrate images</a></li>
<li class="toctree-l2"><a class="reference internal" href="../large/#local-split-merge">Local Split-Merge</a></li>
<li class="toctree-l2"><a class="reference internal" href="../large/#distributed-split-merge">Distributed Split-Merge</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../large/#getting-started-with-distributed-split-merge">Paano simulan ang Distributed Split-Merge</a></li>
<li class="toctree-l3"><a class="reference internal" href="../large/#understanding-the-cluster">Pagkaunawa sa Cluster</a></li>
<li class="toctree-l3"><a class="reference internal" href="../large/#accessing-the-logs">Pag-access sa Logs</a></li>
<li class="toctree-l3"><a class="reference internal" href="../large/#autoscaling-clusterodm">Autoscaling ClusterODM</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../large/#limitations">Mga limitasyon</a></li>
<li class="toctree-l2"><a class="reference internal" href="../large/#acknowledgments">Acknowledgments</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="../resources/">Karagdagang Sanggunian</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../resources/#for-users">Para sa gagamit</a></li>
<li class="toctree-l2"><a class="reference internal" href="../resources/#for-developers">Para sa mga taga-buo.</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="../flying/">Mga Paalala sa Pagpapalipad</a></li>
<li class="toctree-l1"><a class="reference internal" href="../multispectral/">Multispectral Support</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../multispectral/#hardware">Hardware</a></li>
<li class="toctree-l2"><a class="reference internal" href="../multispectral/#usage">Paggamit</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="../requesting-features/">Paano Magrequest ng Features</a></li>
<li class="toctree-l1"><a class="reference internal" href="../contributing/">Paano makadaragdag</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../contributing/#community-forum">Pagtitipon ng Komunidad</a></li>
<li class="toctree-l2"><a class="reference internal" href="../contributing/#reporting-bugs">Pagsumite ng mga Sira</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../contributing/#template-for-submitting-bug-reports">Template para sa pagpapasa ng Bug Reports</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../contributing/#pull-requests">Ipakita ang mga Request</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="../faq/">Frequently Asked Questions</a><ul>
<li class="toctree-l2"><a class="reference internal" href="../faq/#data-processing">Data Processing</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../faq/#can-i-process-two-or-more-orthophoto-geotiffs-to-stitch-them-together">Can I process two or more orthophoto GeoTIFFs to stitch them together?</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="../faq/#licensing">Licensing</a><ul>
<li class="toctree-l3"><a class="reference internal" href="../faq/#i-want-to-build-a-commercial-application-that-includes-odm-do-i-need-a-commercial-license">I want to build a commercial application that includes ODM. Do I need a commercial license?</a></li>
<li class="toctree-l3"><a class="reference internal" href="../faq/#are-there-other-licensing-options-aside-from-the-agplv3">Are there other licensing options aside from the AGPLv3?</a></li>
</ul>
</li>
</ul>
</li>
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<div class="section" id="ground-control-points">
<h1>Ground Control Points<a class="headerlink" href="#ground-control-points" title="Permalink to this headline">露</a></h1>
<p>Ang mga GCP ay kapaki-pakinabang para sa pagwawasto ng mga pagbaluktot sa datos at pagtukoy sa datos upang malaman ang mga coordinate system.</p>
<p>Ang Ground Control Point (GCP) ay isang pagsukat sa posisyon na ginawa sa lupa, karaniwang ginagamitan ng isang mataas na katumpakan na GPS. (Toffanin 2019)</p>
<p>Ang mga GCP ay maaaring itakda sa mga istraktura tulad ng mga sulok ng simento, mga linya sa isang paradahan o mga tile sa sahig na nagsasalitan ang kulay, kung hindi man ay maitatakda gamit ang mga target na nakalagay sa lupa.</p>
<p>Maaaring mabili o gumawa ang mga target gamit ang samut-saring mga materyales tuland ng mga takip ng timba at ng mga tile sa sahig.</p>
<div class="section" id="recommended-practices-for-gcp-setting">
<h2>Mga nirerekumendang gawi para sa paglagay ng GCP<a class="headerlink" href="#recommended-practices-for-gcp-setting" title="Permalink to this headline">露</a></h2>
<p>Panatilihing nakikita ang mga GCP para sa lahat ng mga lokasyon ng camera. Isaalang-alang ang inaasahang ng lupa, pag-iilaw, halaman,ground sampling distance, mga gusali at lahat ng mga hadlang.</p>
<p>Kumuha ng pantay-pantay na distribusyon ng GCPs sa loob ng proyekto, na sinasakupan ang mataas at mababa na elevation. Ang pinakamaliit na value na pwede ay 5 GCP para sa mga karaniwan na trabaho. Para naman sa malalaking proyekto, ang 8-10 ay sapat na. I-locate ang mga points na malapit sa mga kanto at ang iba naman ay sa gitna habang isinasangalang-alang ang GCP na dapat ay mas malalaki kesa sa image footprint para mas makakita ng mahigit sa isang GCP sa isang imahe.</p>
<p>Para masiguro na lahat ng GCP ay makikita sa 5 na imahe, ihiwalay ang points 10 to 30 meters mula sa perimeter ng proyekto. Ang distansiya na ito ay dependent sa overlapping, kung kaya ang pagdagdag ng overlapping ay makakabawas sa required na distansiya mula sa perimeter.</p>
</div>
<div class="section" id="gcp-file-format">
<h2>GCP file format<a class="headerlink" href="#gcp-file-format" title="Permalink to this headline">露</a></h2>
<p>Ang format ng GCP file ay simple lamang.</p>
<blockquote>
<div><ul class="simple">
<li><p>Ang projection para sa geo coordinates ay dapat na mapunta sa unang linya. Eto ay maaaring matukoy bilang PROJ string (e.g. <code class="docutils literal notranslate"><span class="pre">+proj=utm</span> <span class="pre">+zone=10</span> <span class="pre">+ellps=WGS84</span> <span class="pre">+datum=WGS84</span> <span class="pre">+units=m</span> <span class="pre">+no_defs</span></code>), EPSG code (e.g. <code class="docutils literal notranslate"><span class="pre">EPSG:4326</span></code>) o bilang <code class="docutils literal notranslate"><span class="pre">WGS84</span> <span class="pre">UTM</span> <span class="pre">1[N|S]</span></code> value (eg. <code class="docutils literal notranslate"><span class="pre">WGS84</span> <span class="pre">UTM</span> <span class="pre">16N</span></code>)</p></li>
<li><p>Ang mga subsequent lines na X, Y &amp; Z coordinates, ang associated pixels, ang image filename at optional extra fields, hiwalay by tabs o space.</p></li>
<li><p>Ang elevation values ay mase-set sa &quot;NaN&quot; para ma-indicate na ito ay walang value.</p></li>
<li><p>Ang ika-7 na column (optional) ay madalas naglalaman ng label ng GCP.</p></li>
</ul>
</div></blockquote>
<p>GCP file format:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="o">&lt;</span><span class="n">projection</span><span class="o">&gt;</span>
<span class="n">geo_x</span> <span class="n">geo_y</span> <span class="n">geo_z</span> <span class="n">im_x</span> <span class="n">im_y</span> <span class="n">image_name</span> <span class="p">[</span><span class="n">gcp_name</span><span class="p">]</span> <span class="p">[</span><span class="n">extra1</span><span class="p">]</span> <span class="p">[</span><span class="n">extra2</span><span class="p">]</span>
<span class="o">...</span>
</pre></div>
</div>
<p>Halimbawa:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="o">+</span><span class="n">proj</span><span class="o">=</span><span class="n">utm</span> <span class="o">+</span><span class="n">zone</span><span class="o">=</span><span class="mi">10</span> <span class="o">+</span><span class="n">ellps</span><span class="o">=</span><span class="n">WGS84</span> <span class="o">+</span><span class="n">datum</span><span class="o">=</span><span class="n">WGS84</span> <span class="o">+</span><span class="n">units</span><span class="o">=</span><span class="n">m</span> <span class="o">+</span><span class="n">no_defs</span>
<span class="mf">544256.7</span> <span class="mf">5320919.9</span> <span class="mi">5</span> <span class="mi">3044</span> <span class="mi">2622</span> <span class="n">IMG_0525</span><span class="o">.</span><span class="n">jpg</span>
<span class="mf">544157.7</span> <span class="mf">5320899.2</span> <span class="mi">5</span> <span class="mi">4193</span> <span class="mi">1552</span> <span class="n">IMG_0585</span><span class="o">.</span><span class="n">jpg</span>
<span class="mf">544033.4</span> <span class="mf">5320876.0</span> <span class="mi">5</span> <span class="mi">1606</span> <span class="mi">2763</span> <span class="n">IMG_0690</span><span class="o">.</span><span class="n">jpg</span>
</pre></div>
</div>
<p>Kung ikaw ay nagsupply ng GCP file na tinatawag na ang ODM ay automatic na madedetect ito. Kung ito naman ay may ibang pangalan, maaari mong maspecify ito gamit ang <code class="docutils literal notranslate"><span class="pre">--gcp</span> <span class="pre">1</span></code>. Kung ikaw ay may gcp file at nais gumawa ng georeferencing sa exif, pwede mong i-specify ang <code class="docutils literal notranslate"><span class="pre">--use-exif</span></code>. Kung ikaw naman ay may high precision GPS na sukat sa iyong imahe (RTK) at gustong gamiting ang impormasyon na ito kasama ng gcp file, pwede mo itong i-specify bilang <code class="docutils literal notranslate"><span class="pre">--force-gps</span></code>.</p>
<p><a class="reference external" href="http://diydrones.com/profiles/blogs/ground-control-points-gcps-for-aerial-photography">Ang post na ito ay may impormasyon tungkol sa paglagay ng Ground Control Targets bago ang paglipad</a>, ngutin kung ikaw ay meroon ng mga imahe, makikita ang mga points sa imahe post facto. Importante na humanap ng high-contrast objects na makikita sa <strong>at least</strong> 3 litrato, at makakakita ng minimum na 5 objoects.</p>
<p>Ang sharp corners ay magandang option para sa GCPs. DApat ilagay/hanapin ang GCPs ng pantay pantay sa paligid ng isu-survey na area.</p>
<p>Ang <code class="docutils literal notranslate"><span class="pre">gcp_list.txt</span></code> file ay dapat gawin sa base ng project folder.</p>
<p>Para sa mas magandang resulta, ang iyong file ay dapat na magkaroon ng minimum na 15 na linya pagkatapos ng header (5 points na may 3 imahe kada point).</p>
</div>
<div class="section" id="user-interfaces">
<h2>User Interfaces<a class="headerlink" href="#user-interfaces" title="Permalink to this headline">露</a></h2>
<p>Maaaring gumamit ng isa or dalawang user interfaces para sa paggawa ng GCP files:</p>
<blockquote>
<div><ul class="simple">
<li><p><a class="reference external" href="https://github.com/posm/posm-gcpi">POSM GCPi</a></p></li>
<li><p><a class="reference external" href="https://github.com/uav4geo/GCPEditorPro">GCP Editor Pro</a></p></li>
</ul>
</div></blockquote>
<div class="section" id="id1">
<h3>POSM GCPi<a class="headerlink" href="#id1" title="Permalink to this headline">露</a></h3>
<p>Ang POSM GCPi ay loaded by default sa WebODM. Isang halimbawa dito ay mahahanap sa <a class="reference external" href="http://demo.webodm.org/plugins/posm-gcpi/">the WebODM Demo</a>. Para gamitin ito sa ground control XYZ values, dapat gawin ang mga sumusunod:</p>
<p>Gumawa ng GCP na listahan na may kasamang gcp names (ito ang label na makikita sa GCP interface), x, y, and z, na may header na proj4 string sa GCPs (siguraduhin na may planar coordinate system tulad ng UTM. Ganito ang magiging itsura dapat:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="o">+</span><span class="n">proj</span><span class="o">=</span><span class="n">utm</span> <span class="o">+</span><span class="n">zone</span><span class="o">=</span><span class="mi">37</span> <span class="o">+</span><span class="n">south</span> <span class="o">+</span><span class="n">ellps</span><span class="o">=</span><span class="n">WGS84</span> <span class="o">+</span><span class="n">datum</span><span class="o">=</span><span class="n">WGS84</span> <span class="o">+</span><span class="n">units</span><span class="o">=</span><span class="n">m</span> <span class="o">+</span><span class="n">no_defs</span>
<span class="n">gcp01</span> <span class="mf">529356.250827686</span> <span class="mf">9251137.5643209</span> <span class="mf">8.465</span>
<span class="n">gcp02</span> <span class="mf">530203.125367657</span> <span class="mf">9250140.80991621</span> <span class="mf">15.781</span>
<span class="n">gcp03</span> <span class="mf">530292.136003818</span> <span class="mf">9250745.02372435</span> <span class="mf">11.977</span>
<span class="n">gcp04</span> <span class="mf">530203.125367657</span> <span class="mf">9250140.80991621</span> <span class="mf">15.781</span>
<span class="n">gcp05</span> <span class="mf">530292.136003818</span> <span class="mf">9250745.02372435</span> <span class="mf">11.977</span>
</pre></div>
</div>
<p>Pwedeng i-load ang GCP list sa interface, i-load ang imahe, at ilagay ang mga GPCs sa imahe.</p>
</div>
<div class="section" id="id2">
<h3>GCP Editor Pro<a class="headerlink" href="#id2" title="Permalink to this headline">露</a></h3>
<p>Ang aplikasyon na ito ay dapat i-install ng hiwalay o di kaya naman ay pwedeng i-load bilang WebODM plugin mula sa <a class="reference external" href="https://github.com/uav4geo/GCPEditorPro">https://github.com/uav4geo/GCPEditorPro</a></p>
<p>Gumawa ng CSV file na kasama ang GCP name, northing, easting and elevation.</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">GCP</span> <span class="n">Label</span><span class="p">,</span><span class="n">Northing</span><span class="p">,</span><span class="n">Easting</span><span class="p">,</span><span class="n">Elevation</span>
<span class="n">gcp01</span><span class="p">,</span><span class="mf">529356.250827686</span><span class="p">,</span><span class="mf">9251137.5643209</span><span class="p">,</span><span class="mf">8.465</span>
<span class="n">gcp02</span><span class="p">,</span><span class="mf">530203.125367657</span><span class="p">,</span><span class="mf">9250140.80991621</span><span class="p">,</span><span class="mf">15.781</span>
<span class="o">...</span>
</pre></div>
</div>
<p>I-import ang CSV mula sa main screen at i-type ang <code class="docutils literal notranslate"><span class="pre">+proj=utm</span> <span class="pre">+zone=37</span> <span class="pre">+south</span> <span class="pre">+ellps=WGS84</span> <span class="pre">+datum=WGS84</span> <span class="pre">+units=m</span> <span class="pre">+no_defs</span></code> mula sa <code class="docutils literal notranslate"><span class="pre">EPSG/PROJ</span></code> box.</p>
<p>Ang susunod na screen ay magdi-display ng map kung saan pipiliin ang GCPs para ma-tag at ma-import ang mga imahe.</p>
</div>
</div>
<div class="section" id="references">
<h2>References<a class="headerlink" href="#references" title="Permalink to this headline">露</a></h2>
<p>Toffanin, Piero. <a class="reference external" href="https://odmbook.com/">Open Drone Map: The Missing Guide.</a> MasseranoLabs LLC, 2019.</p>
<p><a class="reference external" href="https://github.com/opendronemap/docs#how-to-make-your-first-contribution">Learn to edit</a> and help improve <a class="reference external" href="https://github.com/OpenDroneMap/docs/blob/publish/source/gcp.rst">this page</a>!</p>
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