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#turfjs

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Steve Bennett<p>Wow, I just submitted a pull request for Turf. That hasn't happened for a long time.</p><p><a href="https://github.com/Turfjs/turf/pull/2814" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">github.com/Turfjs/turf/pull/28</span><span class="invisible">14</span></a></p><p><a href="https://mastodon.social/tags/turfJS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>turfJS</span></a></p>
Mark Stosberg<p>For those who use the Turf.js JavaScript library for GIS/mapping work. Turf 7.2.0 has been released, which fixes a lot of edge case bugs by replacing their `polygon-clippling` dependency with `polyclip-ts`. </p><p><a href="https://github.com/Turfjs/turf/releases" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">github.com/Turfjs/turf/release</span><span class="invisible">s</span></a></p><p><a href="https://urbanists.social/tags/JavaScript" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>JavaScript</span></a> <a href="https://urbanists.social/tags/Nodejs" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Nodejs</span></a> <a href="https://urbanists.social/tags/TurfJS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>TurfJS</span></a> <a href="https://urbanists.social/tags/Turf" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Turf</span></a> <a href="https://urbanists.social/tags/GIS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>GIS</span></a> <a href="https://urbanists.social/tags/Mapping" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Mapping</span></a></p>
Eugene Alvin Villar 🇵🇭<p>The Bing ML buildings data is from this GitHub repo and first released in 2012: <a href="https://github.com/microsoft/IdMyPhBuildingFootprints" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">github.com/microsoft/IdMyPhBui</span><span class="invisible">ldingFootprints</span></a></p><p>I used the following tools/services:<br>▪︎ <span class="h-card" translate="no"><a href="https://en.osm.town/@geofabrik" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>geofabrik</span></a></span> for the OSM buildings<br>▪︎ <a href="https://en.osm.town/tags/OverpassTurbo" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>OverpassTurbo</span></a> for extracting clipping polygons from OSM<br>▪︎ Osmosis for filtering the OSM buildings<br>▪︎ <span class="h-card" translate="no"><a href="https://fosstodon.org/@qgis" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>qgis</span></a></span> <a href="https://en.osm.town/tags/QGIS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>QGIS</span></a> for GeoJSON clipping and data conversion<br>▪︎ A couple of hand-coded Perl scripts for data manipulation<br>▪︎ <a href="https://en.osm.town/tags/TurfJS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>TurfJS</span></a><br>▪︎ <a href="https://en.osm.town/tags/LeafletJS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>LeafletJS</span></a> for rendering<br>▪︎ H3 for hexbinning<br>▪︎ <span class="h-card" translate="no"><a href="https://floss.social/@GIMP" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>GIMP</span></a></span> <a href="https://en.osm.town/tags/GIMP" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>GIMP</span></a> for final map prep</p><p>🧵 3/4</p>
Mark Stosberg<p>I was helping an <a href="https://urbanists.social/tags/UrbanPlanning" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>UrbanPlanning</span></a> friend with some spatial analysis with <a href="https://urbanists.social/tags/QGIS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>QGIS</span></a> but the project seemed to be running out of her 8GB memory.</p><p>I advised a <a href="https://urbanists.social/tags/FrameworkLaptop" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FrameworkLaptop</span></a> with more memory. She got the DIY option, which lead her to consider her OS choice, which lead her try <a href="https://urbanists.social/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Linux</span></a> (<a href="https://urbanists.social/tags/Ubuntu" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Ubuntu</span></a>), which is what she installed after testing it.</p><p>Now we'll get back on track using <a href="https://urbanists.social/tags/QGIS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>QGIS</span></a> / <a href="https://urbanists.social/tags/Docker" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Docker</span></a> / <a href="https://urbanists.social/tags/Valhalla" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Valhalla</span></a> / <a href="https://urbanists.social/tags/TurfJS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>TurfJS</span></a> to explore some spatial analysis ideas.</p>
Mark Stosberg<p>I've now published a write-up and the source code for how I calculated a connectivity rank which could be used to help prioritize how a bike network is built out based how segments would improve connections with the existing network.</p><p><a href="https://mark.stosberg.com/bike-network-connectivity-rank/?ref=mastodon" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">mark.stosberg.com/bike-network</span><span class="invisible">-connectivity-rank/?ref=mastodon</span></a></p><p>Thanks to all the open source mapping projects that helped make this possible, including <a href="https://urbanists.social/tags/qgis" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>qgis</span></a> <a href="https://urbanists.social/tags/valhalla" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>valhalla</span></a> <a href="https://urbanists.social/tags/josm" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>josm</span></a> and <a href="https://urbanists.social/tags/turfjs" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>turfjs</span></a>. And yes, I used JavaScript for this. </p><p>Feedback, improvements welcome!</p><p><a href="https://urbanists.social/tags/mapping" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>mapping</span></a> <a href="https://urbanists.social/tags/spatialAnalysis" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>spatialAnalysis</span></a> <a href="https://urbanists.social/tags/minneapolis" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>minneapolis</span></a></p>
Mark Stosberg<p>Currently waiting on my old laptop to merge 3,476 isochrone polygons into a single MultiPolygon, 🤞 that it doesn't crash part way through. </p><p><a href="https://urbanists.social/tags/turfjs" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>turfjs</span></a> does crash in cases like this, so I'm using `polyclip-ts`.</p><p>Another project I'd like to get to is submitting a pull request to the Turf.js project to switch to using polyclip-ts internally, so it doens't crash either. Discussion about this spread across a few issues. One of them is here:</p><p><a href="https://github.com/Turfjs/turf/issues/2409#issuecomment-1662873720" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">github.com/Turfjs/turf/issues/</span><span class="invisible">2409#issuecomment-1662873720</span></a> </p><p>1,500 polygons left to merge...🧵</p>
Mark Stosberg<p>🧵 Downgrading @turf/boolean-intersects to 6.5.0 appears to resolve the issue. Perhaps if I have time I can circle back later and see about a patch to fix that regression.</p><p><a href="https://github.com/Turfjs/turf/issues/2585#issuecomment-2207850688" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">github.com/Turfjs/turf/issues/</span><span class="invisible">2585#issuecomment-2207850688</span></a></p><p><a href="https://urbanists.social/tags/turfjs" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>turfjs</span></a> 🧵</p>
Mark Stosberg<p><span class="h-card" translate="no"><a href="https://a2mi.social/@samfirke" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>samfirke</span></a></span> <span class="h-card" translate="no"><a href="https://mastodon.nz/@spatialThinkLab" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>spatialThinkLab</span></a></span> I can't confirm. I can't videos from the 2023 conference at least. </p><p>Besides the source code I linked above, I also have a blog post about sidewalk priority mapping:</p><p><a href="https://mark.stosberg.com/how-to-create-a-heatmap-sidewalk-location-priority/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">mark.stosberg.com/how-to-creat</span><span class="invisible">e-a-heatmap-sidewalk-location-priority/</span></a></p><p><a href="https://urbanists.social/tags/OpenStreetMap" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>OpenStreetMap</span></a> <a href="https://urbanists.social/tags/turfjs" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>turfjs</span></a></p>
Mark Stosberg<p>v3.0 of my "Walk Potential" software has been released. This an <a href="https://urbanists.social/tags/UrbanPlanning" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>UrbanPlanning</span></a> <a href="https://urbanists.social/tags/mapping" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>mapping</span></a> tool used in planning to quantify the number of "interesting" places nearby to walk. Useful metric for demand to fix sidewalk network gaps.</p><p>Release notes: <a href="https://gitlab.com/markstos/walk-potential/-/releases/v3.0.0" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">gitlab.com/markstos/walk-poten</span><span class="invisible">tial/-/releases/v3.0.0</span></a></p><p>Docs: <a href="https://gitlab.com/markstos/walk-potential/-/blob/main/README.md" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">gitlab.com/markstos/walk-poten</span><span class="invisible">tial/-/blob/main/README.md</span></a></p><p>First reply with a boundary polygon for their city wins free Walk Potential analysis for that city.</p><p><a href="https://urbanists.social/tags/gis" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>gis</span></a> <a href="https://urbanists.social/tags/BloomingtonIN" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>BloomingtonIN</span></a> <a href="https://urbanists.social/tags/OpenStreetMap" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>OpenStreetMap</span></a> <a href="https://urbanists.social/tags/OpenTripPlanner" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>OpenTripPlanner</span></a> <a href="https://urbanists.social/tags/TurfJS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>TurfJS</span></a> </p><p>Example Walk Potential Heatmap:</p>
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