Re: [Talk-ca] [Talk-us] Province / State borders

2009-03-31 Thread Ian Dees
On Mon, Mar 30, 2009 at 8:38 AM, Adam Schreiber  wrote:

>
> They weren't duplicated.  Ian (I believe?) imported the borders for
> the New England and Mid-Atlantic states and I imported the rest.
>

It might be the county border imports. I imported those without doing any
polygon-overlap-detection stuff. So they will probably overlap quite readily
in some places.
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Re: [Talk-ca] [Talk-us] Province / State borders

2009-03-31 Thread Adam Schreiber
On Mon, Mar 30, 2009 at 6:59 AM, Richard Weait  wrote:
> I've adjusted the boundary=admin rendering on my tile server to make
> more sense for North America.  Rendering the state / provincial borders
> at zoom 1 & 2 might be overdoing it, but at zoom 3 looks reasonable.  It
> does point out a potential shortcoming in the boundary data though.
> Borders for Vermont and New York appear "bolder" than for Minnesota and
> Illinois.  Have they been tagged differently, or duplicated?  Anyone
> have a border-checker script?

They weren't duplicated.  Ian (I believe?) imported the borders for
the New England and Mid-Atlantic states and I imported the rest.

Looking at my saved .osm files from the state boundary import,it looks
like they are tagged:
admin_level = 4
border_type = state
boundary = administrative
state:left = foo
state:right = bar

Cheers,

Adam


>
> See it here for part of North East. http://weait.com/maps very slow
> server/connection.
>
> Best regards,
> Richard
>
>
> P.S. My boundary hack.
>
>    
>      [admin_level]='4'
>      5
>      
>        purple
>        1
>        
>        0.2
>      
>    
>
>
>
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>

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Re: [Talk-ca] [Talk-us] Province / State borders

2009-03-31 Thread Bill Ricker
On Mon, Mar 30, 2009 at 6:59 AM, Richard Weait  wrote:
> Borders for Vermont and New York appear "bolder" than for Minnesota and
> Illinois.  Have they been tagged differently, or duplicated?

an additional possibility is eastern borders are more wiggly following
terrain as opposed to ruler on a map by the surveyors following in the
wake of Lewis & Clark , and so those borders might render wider at low
zoom, because the points are dense and not aligned?  In the bad old
days, mapping systems had to decimate borders to scale before
rendering, which can alas truncate Cape Cod.

-- 
Bill
n1...@arrl.net bill.n1...@gmail.com

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