[OSM-newbies] Defining Areas

[Thomas Wood]

On Tue, Mar 11, 2008 at 7:27 PM, James Ewen <jewen at shaw.ca> wrote:
> On Tue, Mar 11, 2008 at 12:18 PM, Thomas Wood
>  <grand.edgemaster at gmail.com> wrote:
>
>
>  >  There are currently two commonly used border drawing methods:
>  >  1) Draw a complete closed polygon around the area, sharing nodes where
>  >  they meet other borders.
>
>  Okay, that looks like what I want to do... how do you share nodes? I
>  see an example where Nonsuch Park abuts Cheam Park. Clicking on a way
>  defining the park highlights the whole border of that park, including
>  the shared border.
>
This method doesn't always work for massive areas - the osmarender
renderer may not like very large ways (>5000 nodes I think is the
approx limit)
>
>  >  2) Make a border up of separate ways so one way defines one border
>  >  between two places, using a relation to group the pieces of a region's
>  >  border together.
>
>  I see an example of that for the district border just north of A24...
>  Are you able to define an area using this method? Do the district
>  names ever show up on the map at a specific zoom level?
>
Unfortunately not at the moment. So far, there are few completed
boundaries - and any that are bulk-imported use the polygon method.
It would be nice if someone would get the renderers to apply rendering
to grouped sets of ways.
>
>  >  I may as well give an example as well.
>  >  http://openstreetmap.org/?lat=51.3598&lon=-0.2241&zoom=15&layers=0BFT
>
>  Small world... my mother was born in Leatherhead back in 1922... She
>  might even recognize some of the area if I were to show it to her!
>
>  James
>  VE6SRV
>
>
>
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>



-- 
Regards,
Thomas Wood
(Edgemaster)