Is there a rule (or a hint) as to how I can recognize (political) boundaries. Is It country dependant? I am particularly interested in Swiss community boundaries. For example, the relation 1682248 has the the tags boundary=administrative, name=Zürich, place=city,swisstopo:OBJEKTART=Gemeindegebiet and type=boundary associated with it.

Is it safe to assume that I can query for boundary=administrative and name=$VILLAGENAME in order to find the nessesary ways for the boundaries.

Also, can I take it as a given that such a boundary is always a relation?

asked 20 Feb '12, 16:48

Ren%C3%A9%20Nyffenegger's gravatar image

René Nyffene...
16113
accept rate: 0%


There is no way to guarantee that no one have edited the data so that it does not work. According to the wiki you can assume that this is the case. But be aware that errors might occur.

permanent link

answered 21 Feb '12, 22:28

Gnonthgol's gravatar image

Gnonthgol ♦
13.6k15101198
accept rate: 16%

To test this, you can try one way:

  • Download raw OSM data for the country or region you are interested in (via geofabrik.de or cloudmade.com)
  • Do a filtering process for example via osmfilter and keep anything with boundary=administrative
  • choose a way to display the filtered data, for example via MapCSS in JOSM
permanent link

answered 21 Feb '12, 16:13

stephan75's gravatar image

stephan75
12.5k453209
accept rate: 6%

Yes, that's right. But can I rely on boundary=administrative to return only and all political boundaries?

(21 Feb '12, 18:48) René Nyffene...

The data on administrative boundaries is quite up to date and originates from an concerted import effort of the Swiss osm community, which is documented as follows: - http://wiki.openstreetmap.org/wiki/EN:Switzerland/swissBOUNDARIES3D - http://wiki.openstreetmap.org/wiki/DE:Grenzen_der_Schweiz

To my knowledge the boundaries for cantons and communities should be quite complete, a couple of cantons also have the districts (Bezirke) but for other I wouldn't know. A word about completeness: The boundary-import from Swisstopo was done in a systematic way and the complete data was available. However and as always in osm - check the data, live with its errors and/or fix them yourself.

I briefly checked via overpass-api the boundary=administrative relations and there are 3329 in Switzerland, so it shouldn't look too bad.

permanent link

answered 22 Feb '12, 12:52

FischersFritz's gravatar image

FischersFritz
19117
accept rate: 0%

Your answer
toggle preview

Follow this question

By Email:

Once you sign in you will be able to subscribe for any updates here

By RSS:

Answers

Answers and Comments

Markdown Basics

  • *italic* or _italic_
  • **bold** or __bold__
  • link:[text](http://url.com/ "title")
  • image?![alt text](/path/img.jpg "title")
  • numbered list: 1. Foo 2. Bar
  • to add a line break simply add two spaces to where you would like the new line to be.
  • basic HTML tags are also supported

Question tags:

×820
×100

question asked: 20 Feb '12, 16:48

question was seen: 2,290 times

last updated: 22 Feb '12, 12:52

powered by OSQA