<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Wed, Mar 25, 2015 at 2:00 AM, Minh Nguyen <span dir="ltr"><<a href="mailto:minh@nguyen.cincinnati.oh.us" target="_blank">minh@nguyen.cincinnati.oh.us</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I've taken quite a few imported municipal boundaries, lined them up with road easements or hedges between farms _when that is obviously the intent_, and deleted extra nodes. These borders become far more accurate and precise in OSM than in commercial maps, which regurgitate TIGER boundaries verbatim.<br>
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The most authoritative source for most U.S. land borders, going all the way down to the parcel level, is a legal prose definition in conjunction with any number of monuments on the ground. </blockquote><div><br></div><div>Ah, another sticky wicket.<br><br></div>There are many defacto boundaries created by roads, hedges, powerlines, ridges or bodies of water.<br></div><div class="gmail_quote"></div><div class="gmail_quote"><br></div><div class="gmail_quote">I argue the most appropriate boundary in OSM is indeed the defacto boundary. If people are using, paving, weeding<br></div><div class="gmail_quote">and farming the boundary, that's the one we can map.<br></div><div class="gmail_quote"><br></div><div class="gmail_quote">The legal boundary is not something OSM can adjudicate. Finding that boundary is a complex process involving survey points, land descriptions, and often handwritten records stored in dark basements. It also hardy ever matters, at least to a mapper or map reader.<br><br>----<br><br></div><div class="gmail_quote">Note that in the USA boundaries are determined by reference to written deeds, and subject to challenge in court. Various non-registered rights, including right of passage, may exist. It's a huge mess.<br><br></div><div class="gmail_quote">In Australia, as I understand, land ownership is a matter of public record, and all ownership changes must be registered. The government records are, by definition, correct.<br></div></div></div>