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#osmdata

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Cyrille MdC<p><a href="https://urbanists.social/tags/30DayMapChallenge" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>30DayMapChallenge</span></a><br>Day 4: A bad map<br>Tools: <a href="https://urbanists.social/tags/R" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>R</span></a> <a href="https://urbanists.social/tags/osmdata" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>osmdata</span></a> <a href="https://urbanists.social/tags/Inkscape" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Inkscape</span></a> <br>Sources and details: <a href="https://serialc.github.io/30DayMapChallenge/2023/#day-4---a-bad-map" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">serialc.github.io/30DayMapChal</span><span class="invisible">lenge/2023/#day-4---a-bad-map</span></a></p>
Dee Toher<p>Suppose one had used <a href="https://mastodon.ie/tags/osmData" class="mention hashtag" rel="tag">#<span>osmData</span></a> to create a <a href="https://mastodon.ie/tags/map" class="mention hashtag" rel="tag">#<span>map</span></a> in <a href="https://mastodon.ie/tags/Rstats" class="mention hashtag" rel="tag">#<span>Rstats</span></a>. <br />The map is flat.<br />Now you want to define set (known) heights for polygons or lines - not pulling the elevation data from elsewhere, but having a set &quot;height&quot; for roads [lines]<br />, another for &quot;buildings&quot; [polygons] etc. eg: </p><p>Geometry type: POLYGON<br />Dimension: XY<br />Bounding box: xmin: -6.240629 ymin: 53.63689 xmax: -6.235317 ymax: 53.64034<br />Geodetic CRS: WGS 84<br />The st_zm allows me to add a Z dimension, but can I specify a non zero value?</p>
Dee Toher<p>Just wondering if anyone has a worked example of using <a href="https://mastodon.ie/tags/osmdata" class="mention hashtag" rel="tag">#<span>osmdata</span></a> with <a href="https://mastodon.ie/tags/leaflet" class="mention hashtag" rel="tag">#<span>leaflet</span></a> in <a href="https://mastodon.ie/tags/rstats" class="mention hashtag" rel="tag">#<span>rstats</span></a>? <br />For example, I would like to superimpose a polygon representing the boundary of an area and add footpaths as an optional overlay.</p><p>One for those doing the <a href="https://mastodon.ie/tags/30DayMapChallenge" class="mention hashtag" rel="tag">#<span>30DayMapChallenge</span></a> </p><p>In addition: can you use roads to split an existing polygon into two parts? Example: using admin boundaries for 3 sides, but a motorway for the 4th side of a polygon? Or can you combine roads together to make boundaries of a polygon?</p>
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