Simplified state outline data?

[Jeff Dege]

In this application, that won't matter.  But since in other
applications, it might, what do you mean by "using Topology"?


________________________________

	From: UMN MapServer Users List
[mailto:MAPSERVER-USERS at LISTS.UMN.EDU] On Behalf Of David William Bitner
	Sent: Wednesday, April 25, 2007 2:25 PM
	To: MAPSERVER-USERS at LISTS.UMN.EDU
	Subject: Re: [UMN_MAPSERVER-USERS] Simplified state outline
data?
	
	
	Although if you are not using Topology, this will likely lead to
lots of slivers between the states.
	
	
	On 4/24/07, Aaron Racicot < aaronr at z-pulley.com
<mailto:aaronr at z-pulley.com> > wrote: 

		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
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		-----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?
		




	-- 
	************************************ 
	David William Bitner 

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