<div dir="ltr">So your aim is to label building points? <div><br></div><div>If yes, then overlay seems like the least resistance way (I haven't played with that enough, I'd implicitly trust Howard here though) :)</div><div><br></div><div>My maybe-useful addition is that it'll conceptually still work just fine if you have to tile things up, there's no neighbourhood usage going on. So no need to try and jam things all into one giant memory blob.</div><div><br></div><div>Cheers</div><div><br></div><div>Adam</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, 30 Jun 2020 at 04:03, Andrew Bell <<a href="mailto:andrew.bell.ia@gmail.com">andrew.bell.ia@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Jun 29, 2020 at 1:20 PM Stephen V. Mather <<a href="mailto:svm@clevelandmetroparks.com" target="_blank">svm@clevelandmetroparks.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex">
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Ha! Ok, my gut was right. Rasters it is.<br>
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And by massive, I just mean 80k images worth of photogrammetric point clouds over 300km2. I know I estimated how many points that is at one point, but I don't recall now.
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<div id="gmail-m_4230802862367578905gmail-m_7317001894122031503divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Howard Butler <<a href="mailto:howard@hobu.co" target="_blank">howard@hobu.co</a>><br>
<b>Sent:</b> Monday, June 29, 2020 12:50 PM<br>
<b>To:</b> Stephen V. Mather <<a href="mailto:svm@clevelandmetroparks.com" target="_blank">svm@clevelandmetroparks.com</a>><br>
<b>Cc:</b> pdal <<a href="mailto:pdal@lists.osgeo.org" target="_blank">pdal@lists.osgeo.org</a>><br>
<b>Subject:</b> Re: [pdal] Digitized building footprints</font>
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<div>On Jun 29, 2020, at 10:18 AM, Stephen V. Mather <<a href="mailto:svm@clevelandmetroparks.com" target="_blank">svm@clevelandmetroparks.com</a>> wrote:</div>
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Hi All,</div>
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I am processing a dataset for which I have a digitized building footprints. It'd be even cooler if I had vegetation, but beggers != choosers.</div>
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In principle, I could use filters.overlay, but this is a massive dataset, so I am curious if it makes more sense to rasterize, tile things up, and use filters.colorization.</div>
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<div>Define massive ;)</div>
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<div>I think your instinct to rasterize the footprints is the right one here. filters.overlay is going to do point-in-polygon for every point/poly combo. Most are quickly thrown out, but you're going to be checking every one. A raster mask is going to be much
quicker, and you can control the resolution with gdal_rasterize.</div></div></div></div></blockquote><div><br></div><div>I don't know why you wouldn't use the overlay/range option. I don't know any reason why this would be slow and it seems simple.</div><div><br></div></div>-- <br><div dir="ltr">Andrew Bell<br><a href="mailto:andrew.bell.ia@gmail.com" target="_blank">andrew.bell.ia@gmail.com</a></div></div>
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<a href="https://lists.osgeo.org/mailman/listinfo/pdal" rel="noreferrer" target="_blank">https://lists.osgeo.org/mailman/listinfo/pdal</a></blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div>Dr. Adam Steer</div><div><a href="http://spatialised.net" target="_blank">http://spatialised.net</a></div><div><a href="https://www.researchgate.net/profile/Adam_Steer" target="_blank">https://www.researchgate.net/profile/Adam_Steer</a><br><a href="http://au.linkedin.com/in/adamsteer" target="_blank">http://au.linkedin.com/in/adamsteer</a></div><div><a href="http://orcid.org/0000-0003-0046-7236" target="_blank">http://orcid.org/0000-0003-0046-7236</a><br>+61 427 091 712 :: @adamdsteer</div><div><br></div><div>Suits are bad for business: <a href="http://www.spatialised.net/business-penguins/" target="_blank">http://www.spatialised.net/business-penguins/</a></div></div></div></div></div></div></div></div>