<div dir="ltr"><div>Thanks, Greg!!<br></div>I've also sent a brief email to MassGIS asking about possible sources that could be used to confirm parts of towns' boundaries aligned with rivers.<br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, May 29, 2020 at 10:40 AM Greg Troxel <<a href="mailto:gdt@lexort.com">gdt@lexort.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Yury Yatsynovich <<a href="mailto:yury.yatsynovich@gmail.com" target="_blank">yury.yatsynovich@gmail.com</a>> writes:<br>
<br>
> Sorry, Greg, I could have explained in more clearly.<br>
> Here is an example of a border between Newton and Watertown:<br>
> The way (<a href="https://www.openstreetmap.org/way/142866017" rel="noreferrer" target="_blank">https://www.openstreetmap.org/way/142866017</a>) is the border between<br>
> Newton and Watertown and this way is, essentially, a duplicate of the<br>
> Charles River stream. Wikipedia says "From Watertown to Waltham to Needham<br>
> and Dedham <<a href="https://en.wikipedia.org/wiki/Dedham,_Massachusetts" rel="noreferrer" target="_blank">https://en.wikipedia.org/wiki/Dedham,_Massachusetts</a>>, Newton is<br>
> bounded by the Charles River <<a href="https://en.wikipedia.org/wiki/Charles_River" rel="noreferrer" target="_blank">https://en.wikipedia.org/wiki/Charles_River</a>>."<br>
<br>
wikipedia is not authoritative. town boundaries are as I understand it<br>
defined by statute.<br>
<br>
> (this is also confirmed by town's GIS maps, but it would be great if anyone<br>
> could direct me to a formal document that says something like "the border<br>
> between Newton and Watertown goes along the middle of the Charles River")<br>
> -- so, almost certainly, the river itself is the border and if its stream<br>
> changes so does the border. Thus, I suggest excluding the way (<br>
> <a href="https://www.openstreetmap.org/way/142866017" rel="noreferrer" target="_blank">https://www.openstreetmap.org/way/142866017</a>) from the border relations for<br>
> Newton and Watertown and including the corresponding part of the Charles<br>
> River instead. This will help to solve, besides removing duplicate ways,<br>
> the above mentioned problem of when the stream changes, so should the<br>
> border as well.<br>
<br>
I think this needs research into authoriative evidence before doing it.<br>
Absent that, I think our borders should follow the "towns survey" point<br>
layer from massgis.<br>
<br>
<a href="https://docs.digital.mass.gov/dataset/massgis-data-community-boundaries-towns-survey-points" rel="noreferrer" target="_blank">https://docs.digital.mass.gov/dataset/massgis-data-community-boundaries-towns-survey-points</a><br>
<br>
This layer talks about being derived from statute and also gives<br>
references to atlases of boundaries.<br>
<br>
One of my friends is knowledgeable about this sort of thing and I will<br>
ask about this border and statute.<br>
<br>
</blockquote></div><br clear="all"><br>-- <br><div dir="ltr" class="gmail_signature">Yury Yatsynovich</div>