<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Thu, Feb 27, 2014 at 10:57 AM, Janko Mihelić <span dir="ltr"><<a href="mailto:janjko@gmail.com" target="_blank">janjko@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr"><div><div><div><div>I think we can divide features to virtual and physical features.<br>
<br></div>Virtual: highway centerlines, waterway centerlines, administrative borders, industrial and residental landuse, parks<br>
</div>Physical: riverbanks, buildings, meadows, forests, farm fields<br><br>Can we make a rule to never share points between these two groups?</div></div></div></blockquote><div><br></div><div>-1. I don't think that grouping is correct.</div>
<div><br></div><div>First, centerlines model a physical feature.<br></div><div>Second, what you list as physical features are in fact mostly human land uses. Meadows/forests and even riverbanks are constructed and constrained by man.<br>
</div><div><br></div><div>--</div><div>Forests and farm field typically abut roads (you may have forest on one side, farm on the other, at the moment).</div><div>If the road is ever expanded, it will take land from the abutting use. </div>
<div><br></div><div><div>Similarly for a residential land use with a retail land use across the street: there's a dividing line and it's the street. If the road department ever moves the street a few meters, the street will still be the dividing line.</div>
</div><div><br></div><div>Until you get to a level of micromapping that</div><div>currently covers less than 1% of the planet, the road serves remarkably well as the dividing line. There is no "gap"</div><div>
on the ground between the forest and the road: at a first level of mapping they abut.</div>
<div><br></div><div>---</div><div>Perhaps if the editors rendered centerlines with width people would get less uptight about using them</div><div>as boundaries.</div></div></div></div>