<div dir="auto"><div><br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><p class="MsoNormal"><span>Anyway, the best (and most fascinating) “data” regarding town boundaries is the
</span><a href="https://archives.lib.state.ma.us/handle/2452/47855" target="_blank" rel="noreferrer">https://archives.lib.state.ma.us/handle/2452/47855</a>
Atlases created by the Harbor and Lands Cmsn around 1900. They are the
original statewide surveys of town boundaries</p></div></blockquote></div></div><div dir="auto"><br></div><div dir="auto">Those ATLASes are good reading.</div><div dir="auto">They are the Bible for the circumambulate the bounds exercise for each town/city.</div><div dir="auto">I've downloaded a bunch of them.</div><div dir="auto"> </div><div dir="auto"><br></div><div dir="auto">Warning on data: the latitude longitude and state X-Y posits listed in those were referenced to an antique geode and datum and can NOT be directly used. AFAIK.</div><div dir="auto"><br></div><div dir="auto"> (If Paul @ MassGIS or anyone else has proj4 or similar definitions of the old geode / datum / coordinate systems in the Atlases, that would be wonderful to facilitate direct use. I tried to reverse engineer based on X-Y being statehouse cupola centered and it didn't work well IIRC. If we had a transform(s), it might be<span style="font-family:sans-serif"> practical to georeference the plates as layers for our editors or Gra</span>ss/QGis??) </div><div dir="auto"><br></div><div dir="auto">Mass DOT has a public GIS website that has town corners as a layer (in addition to USGS and Mass geodetic disks/monuments) with modern GEODE/DATUM posits. The atlas will explain more but this gives the modern GPS posit if you want to find it. IDK the license status of that data wrto OSM, but should be usable for QA/QC.</div><div dir="auto"><br></div><div dir="auto"> (I've done some fudging deriving an ad hoc affine transform between DOT corner posits and the Atlas, in order to transform Atlas points not in any modern registry in Middlesx Fells, assuming it's smooth. At some point I will venture over to the State Archives to inspect the original survey of the Fells, having been granted referral from the DCR/MDC archivist who sent them. Much geonerdery fun there, but not directly relevant to OSM, starting with the "MIT Geodetic Observatory". Which we should present at a mapup or virtual mapup sometime!)</div><div dir="auto"><br></div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">
<p class="MsoNormal" style="line-height:115%"><b><span style="font-size:10pt;line-height:115%;font-family:"Arial",sans-serif;color:rgb(67,149,111)">Paul Nutting
</span></b><b><span style="font-size:10pt;line-height:115%;font-family:"Arial",sans-serif;color:gainsboro"><span> </span>|</span></b><b><span style="font-size:10pt;line-height:115%;font-family:"Arial",sans-serif;color:rgb(83,83,83)"><span>
</span>Outreach Coordinator-MassGIS</span></b></p></div></blockquote></div></div><div dir="auto"><br></div><div dir="auto">Oh cool. That would be who I need to discuss the Fells geodetic points that got merged or lost in the state and federal catalogs during digitization. ( I think we've met at either at a mapup or a Suffolk Co political event.)</div><div dir="auto"><br></div><div dir="auto">// Bill in Boston</div><div dir="auto"><br></div><div dir="auto"><br></div></div>