Morgan Fletcher :vbike:<p>I didn't know there was a <a href="https://sfba.social/tags/30DayMapChallenge" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>30DayMapChallenge</span></a>. Thanks to <span class="h-card" translate="no"><a href="https://indieweb.social/@clhenrick" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>clhenrick</span></a></span> for the heads-up. Here's a <a href="https://sfba.social/tags/map" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>map</span></a> I <a href="https://sfba.social/tags/georeferenced" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>georeferenced</span></a> for a friend the other night, who was curious how the 1909 'Map of <a href="https://sfba.social/tags/Ohlone" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Ohlone</span></a> <a href="https://sfba.social/tags/shellmounds" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>shellmounds</span></a> in the <a href="https://sfba.social/tags/SanFranciscoBayArea" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SanFranciscoBayArea</span></a> from Nels C. Nelson's 1909 publication SHELLMOUNDS OF THE SAN FRANCISCO BAY REGION' would look, on a modern map. I know this isn't a new thing, others have done it, but here's my contribution in 72dpi, attached, and 600dpi, downloadable from here:</p><p><a href="https://drive.google.com/file/d/1-gvzZ84uNxdleFz_pmm1iixgHQ3OEEDk/view?usp=drive_link" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">drive.google.com/file/d/1-gvzZ</span><span class="invisible">84uNxdleFz_pmm1iixgHQ3OEEDk/view?usp=drive_link</span></a></p><p>I used this file's largest available version, <a href="https://sfba.social/tags/QGIS" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>QGIS</span></a> and <a href="https://sfba.social/tags/OpenStreetMap" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>OpenStreetMap</span></a> to generate it:</p><p><a href="https://commons.wikimedia.org/wiki/File:Shellmound_map.png" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">commons.wikimedia.org/wiki/Fil</span><span class="invisible">e:Shellmound_map.png</span></a></p><p>It is fascinating to see the coastline changes since 1909. The man-made portion of <a href="https://sfba.social/tags/TreasureIsland" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>TreasureIsland</span></a> doesn't exist, and it's Goat Island. I can share the .qgz file, if you want it.</p><p>I've gone down the rabbit hole, reading about <a href="https://sfba.social/tags/shelllmounds" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>shelllmounds</span></a>. Many blog posts here:</p><p><a href="https://fastestslowguy.blogspot.com/search/label/shellmound" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">fastestslowguy.blogspot.com/se</span><span class="invisible">arch/label/shellmound</span></a></p><p>And even more <a href="https://sfba.social/tags/NewspaperClippings" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>NewspaperClippings</span></a> here:</p><p><a href="https://www.newspapers.com/clippings/?query=shellmound&amp;user=3570264%3Amorganfletcher&amp;tag=shellmounds" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">newspapers.com/clippings/?quer</span><span class="invisible">y=shellmound&amp;user=3570264%3Amorganfletcher&amp;tag=shellmounds</span></a></p><p><a href="https://sfba.social/tags/NativeAmerican" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>NativeAmerican</span></a> <a href="https://sfba.social/tags/sfbayareahistory" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sfbayareahistory</span></a> <a href="https://sfba.social/tags/sfbay" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sfbay</span></a></p>