[OSM-talk] National borders - mapnik
Beau Gunderson
beau at beaugunderson.com
Wed May 28 20:42:17 BST 2008
The US national border with Canada is all tagged with admin_level=4,
border_type=state, border=administrative... It also has the left/right
countries (at least the bit I looked at in WA did).
How should state borders that are also national borders be tagged?
Does setting admin_level=2 fix the whole problem?
As you can see, they're not currently visible at low zooms:
http://www.openstreetmap.org/?lat=48.83&lon=-118.46&zoom=7&layers=B00FF
Beau
On Wed, May 28, 2008 at 1:21 PM, Steve Chilton <S.L.Chilton at mdx.ac.uk>
wrote:
> The latest mapnik stylesheet has the National borders moved from coming in
> at z10 to coming in at z7. Now zooms to z6 show the borders as thin blue
> lines taken from the shape files, and then switch to OSM data at z7 using a
> slightly thicker purple line.
> Not all borders show, for one of two reasons - either they are not
> digitised or are not tagged appropriately.
> So, it would be useful if folk have a look at their own country/area at z7.
> Does in show correctly?
> If not:
> 1 - check whether it has been digitised. If not - is there a valid,
> non-copyrighted source for putting in the border alignment.
> 2 - check whether it is tagged boundary=administrative, admin_level=2. If
> not - change the tagging to that so that it may show.
>
> As a reminder, admin boundaries should be tagged for the admin_level that
> they are (at the highest level). Country/national borders are always
> admin_level=2. Internal borders should be tagged according to the suggested
> schema for that particular country. Details are on the wiki at:
> http://wiki.openstreetmap.org/index.php/Key:boundary
> which also explains the accepted way to tag for the countries on either
> side of the border.
>
> Cheers
> STEVE
>
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