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  <div class="vevent h-event"> <h1 class="summary p-name">PDXOSGeo January Meetup</h1> <div class='date'><time class="dtstart dt-start" title="2026-01-28T18:30:00" datetime="2026-01-28T18:30:00">Wednesday, January 28, 2026 from 6:30</time>–<time class="dtend dt-end" title="2026-01-28T21:00:00" datetime="2026-01-28T21:00:00">9pm</time></div> <div class="location vcard p-location h-card"> <a class="url" href='http://calagator.org/venues/202396416'><span class='fn org p-name'>Ecotrust Building</span></a> <div class="adr p-adr h-adr"> <div class="street-address p-street-address">721 Northwest 9th Avenue</div> <span class="locality p-locality">Portland</span> , <span class="region p-region">OR</span> <span class="postal-code p-postal-code">97209</span> <div class="country-name p-country-name">US</div> (<a href='https://maps.google.com/maps?q=721%20Northwest%209th%20Avenue,%20Portland%20OR%2097209%20US'>map</a>) </div> </div> <div class="description p-description"> <p>Happy New Year geo-nerds!</p> <p>PDXOSGeo connects again this week, Wednesday Jan 28, 6:30p Hot Lips Pizza @ the Natural Capital Center 721 NW 9th Ave, Portland OR. Join us for some show and tell and good open geo discussion!</p> <p>Topic for January: David Percy “Percy” has been doing research on applying Reconstructability Analysis (RA) to categorical raster datasets since 2012, and is preparing to defend his dissertation on Spatial Reconstructability Analysis soon. RA is a form of machine learning that works exclusively with discrete data, so categorical data such as the National Land Cover Database is a perfect source of data for it. These NLCD data have been analyzed in attempts to predict forest dynamics (clearcuts), and wildfire size, specifically looking at how historical vegetation affects these outcomes. Results will be presented that show how these data are useful in modeling future events. All of the extraction for analysis was done in Python using open source GIS libraries Shapely and Rasterio. Code will be shared and discussed.</p> </div> <h3>Links</h3> <ul> <li><a class="url u-url" href="https://pdxosgeo.org/">Website</a></li> </ul> </div>