This page has a nice write-up of three different algorithms. Go Paul!
http://www.personal.kent.edu/~rmuhamma/Compgeometry/MyCG/CG-Applets/Center/centercli.htm
Paul Ramsey wrote:
Wouldn't the ratio of area to perimeter be a similar metric? Also,
wouldn't it be easier to just stop letting politicians draw their own
boundaries? :)
I wonder what the algorithm for minimum enclosing circle is...
(Short answer, no, because we don't have a min-circle routine.)
P.
On Fri, Oct 24, 2008 at 8:59 AM, Lee Meilleur <[EMAIL PROTECTED]> wrote:
Has anyone calculated the Roeck test using PostGIS? This is an area based
measure that computes the ratio of the area of a polygon to the area of the
minimum enclosing circle for the polygon. It's used to measure compactness of
districts for redistricting applications, basically a way to test for
gerrymandering. Thanks.
Lee Meilleur
LCC-GIS Office
Minnesota Legislature
100 Rev. Dr. MLK Jr Blvd.
55 State Office Building
St. Paul, MN 55155
651.296.0098 Fax: 651.297.3697
[EMAIL PROTECTED]
http://www.gis.leg.mn
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Refractions Research, Inc.
(250) 383-3022
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