Simplified state outline data?

Jeff Dege jdege at KORTERRA.COM
Wed Apr 25 07:25:57 PDT 2007


We're not running PostGIS, we're not running PostgresSQL.

Though we may start, if this turns out to be the easiest way to handle
these problems.

> -----Original Message-----
> From: UMN MapServer Users List 
> [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] On Behalf Of Aaron Racicot
> Sent: Tuesday, April 24, 2007 7:18 PM
> To: MAPSERVER-USERS at LISTS.UMN.EDU
> Subject: Re: [UMN_MAPSERVER-USERS] Simplified state outline data?
> 
> You can load [1] the data into PostGIS and use the simplify 
> function [2] to
> create a simplified geometry, and even dump back to shapefile 
> [3] if you
> wish.
> 
> [1] - http://postgis.refractions.net/docs/ch04.html#id2707142
> [2] - http://postgis.refractions.net/docs/ch06.html#id2712912
> [3] - http://postgis.refractions.net/docs/ch04.html#id2707567
> 
> A
> 
> 
> +----------------------------------------+
>  Aaron Racicot - GIS Programmer   
>  360.221.2441 - aaronr at ecotrust.org          
> +----------------------------------------+
>  e c o t r u s t                        
>  pobox 1614
>  langley wa 98260
>  www.ecotrust.org                       
> +----------------------------------------+
> 
> -----Original Message-----
> From: UMN MapServer Users List 
> [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] On
> Behalf Of Jeff Dege
> Sent: Tuesday, April 24, 2007 3:08 PM
> To: MAPSERVER-USERS at LISTS.UMN.EDU
> Subject: [UMN_MAPSERVER-USERS] Simplified state outline data?
> 
> We have an app that needs to generate a map with state outlines, but
> needs to keep the total amount of data as small as possible.
> 
> Fortunately, we don't need precision, a rough approximation of the
> outlines is fine.
> 
> Does anyone know of a source of approximate state outline data?
> 
> Alternatively, does anyone know of a tool I can use to reduce 
> the number
> of points in a geometric feature, while retaining the general outline?
> Something that would take a complicated boundary drawn with 
> points every
> 100 meters and return a simplified boundary drawn with points every 10
> kilometers?
> 



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