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#microtootorial

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Adam Steer<p><span class="h-card" translate="no"><a href="https://fosstodon.org/@qgis" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>qgis</span></a></span> + <a href="https://mapstodon.space/tags/DroneDB" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>DroneDB</span></a> <a href="https://mapstodon.space/tags/microtootorial" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>microtootorial</span></a></p><p>You have some drone images over a transect and want to get the approximate area covered [1]</p><p>Use <a href="https://mapstodon.space/tags/DroneDB" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>DroneDB</span></a> CLI (<a href="https://docs.dronedb.app/docs/cli" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">docs.dronedb.app/docs/cli</span><span class="invisible"></span></a>) to generate image footprints: </p><p>ddb info ./jpg/*.JPG -f geojson --geometry polygon -o footprints.geojson</p><p>Drop the footprint geojson into QGIS [2]. Dissolve them (Vector -&gt; Geoprocessing Tools -&gt; Dissolve) [3].</p><p>Reproject the result to a CRS in metres (eg UTM) and label with $area [4]</p><p>Done!</p><p><a href="https://mapstodon.space/tags/droneMapping" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>droneMapping</span></a> <a href="https://mapstodon.space/tags/FOSS4G" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>FOSS4G</span></a> <a href="https://mapstodon.space/tags/gischat" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>gischat</span></a></p>
Adam Steer<p><a href="https://mapstodon.space/tags/qgis" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>qgis</span></a> <a href="https://mapstodon.space/tags/microtootorial" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>microtootorial</span></a> - label offsets along lines, for times when you want readable labels along lines that are closey spaced. </p><p>This example made with labels -&gt; rule based labels. Set up a rule for "line_number" % 2 = 0, head to label anchoring, set to custom, 50.5%. Duplicate the rule, set the condition to "ELSE", head to anchoring, set to custom, 49.5%.</p><p>Et voila. Staggered odd/even labels. If no line numbers, try FID or some other attribute. Modify anchoring to suit your carto-amazingness!</p>
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