Simplified state outline data?

[Rahkonen Jukka]

Hi,

Open Jump (www.openjump.org) seems to have a couple or menu selections for generalisation and it reads (and writes) shapefiles.  I have never tried those tools myself, though.

-Jukka Rahkonen-

> -----Alkuperäinen viesti-----
> Lähettäjä: UMN MapServer Users List 
> [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] Puolesta Jeff Dege
> Lähetetty: 25. huhtikuuta 2007 17:26
> Vastaanottaja: MAPSERVER-USERS at LISTS.UMN.EDU
> Aihe: Re: [UMN_MAPSERVER-USERS] Simplified state outline data?
> 
> 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?
> > 
>