<div dir="ltr"><div><div><div><div><div><div><div><div><div><div>There are in fact 3 possible methods.<br><br></div>1) use completely separate ways and nodes<br></div>2) reuse nodes of existing roads and rivers, but with partially overlapping ways.<br></div>3) cut the roads and rivers and add sections of those to the boundary relations.<br><br></div>I personally liked and still like the first method. As that means it's easier to import, but also easier to maintain the boundaries. You can just download all boundaries of a certain region via overpass, and shift nodes around to align them to a better source. When start modifying boundaries with partially-downloaded data in the other cases, you quickly run into trouble. Certainly because boundaries usually span a big area, it's not practical to download the entire area when you just want to update a few borders. Also the other way around, when editing features like roads and rivers, it's harder to break the borders by accident when they're not connected at all.<br></div><br></div>OTOH, when a road is actually on a boundary, and the boundary is not connected to the road at all, then the road can be completely on one side of the boundary. This may create extra difficulties with search engines (who won't find that road in the other village). However, Nominatim isn't good at handling border-addresses anyway, no matter how the border is mapped.<br><br></div>But it's up to the Portuguese community to decide how to map their borders IMO.<br><br></div>I would like to see a wiki page explaining which tags you'll use though. Is it only admin_level and name, or do you have bilingual names somewhere, are you planning to add custom keys (f.e. keys used by the national agency of statistics), can postal codes be defined on boundaries in Portugal, ...?<br><br></div><div>Good luck with your import ;)<br></div><div><br></div>Regards,<br></div>Sander<br><div><div><div><div><div><div><div><br></div></div></div></div></div></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">2015-04-13 10:29 GMT+02:00 Martin Koppenhoefer <span dir="ltr"><<a href="mailto:dieterdreist@gmail.com" target="_blank">dieterdreist@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=""><br>
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> Am 13.04.2015 um 03:46 schrieb Marcos Oliveira <<a href="mailto:marcosoliveira.2405@gmail.com">marcosoliveira.2405@gmail.com</a>>:<br>
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> or not to use independent ways all the time or to use elements of the map (i.e. rivers, roads) whenever the administrative limit overlaps said features.<br>
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</span>I'd say this depends on the definition of the border, if it's defined as the river, add the tags to the river, if it "coincidentally" overlaps then use a distinct way.<br>
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Cheers<br>
Martin<br>
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