<html><head><style type="text/css">body, p, li { font-family: NokiaPureTextLight; }</style></head><body><div id="fenix-user-content">
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'NokiaPureTextLight';">Admin boundaries can also be seen, and surveyed, where the tarmac changes.</span></p>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:'NokiaPureTextLight';"><br></p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'NokiaPureTextLight';">Phil (trigpoint)</span></p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'NokiaPureTextLight';">--</span></p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'NokiaPureTextLight';"> </span></p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'NokiaPureTextLight';">Sent from my Nokia N9</span></p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'NokiaPureTextLight';"> </span></p></div><br><div id="fenix-reply-header"><p>On 05/11/2013 14:37 Christoph Hormann wrote:<br></p></div><div id="fenix-quoted-body"><div>
On Tuesday 05 November 2013, Jochen Topf wrote:<br>
> [...] And it is<br>
> totally unclear how things that are supposed to be changed together<br>
> (think borders following a river or road) are to be handled.<br>
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And in principle the OSM data strctures are quite good for this, you can <br>
have a way with waterway=* that is part of a boundary relation.<br>
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In reality borders are nearly always defined either through some real <br>
feature that is map-worthy in OSM on its own (most frequently rivers or <br>
watershed divides) or by straight lines/arcs between points with <br>
specified coordinates. The practical problem is that borders are <br>
mostly imported from external sources which do not contain the actual <br>
definition of the border but an approximation of varying accuracy. The <br>
only place where i have seen truely definition based borders in OSM are <br>
maritime boundaries like:<br>
<br>
<a href="http://www.openstreetmap.org/browse/way/48854191">http://www.openstreetmap.org/browse/way/48854191</a><br>
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-- <br>
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Christoph Hormann<br>
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<a href="http://www.openstreetmap.org/browse/way/48854191">http://www.openstreetmap.org/browse/way/48854191</a><br>
<br>
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<a href="mailto:talk@openstreetmap.org">talk@openstreetmap.org</a><br>
<a href="http://www.openstreetmap.org/browse/way/48854191">http://www.openstreetmap.org/browse/way/48854191</a><br>
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