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New software helps reveal patterns in space and time
Date:9/11/2012

The GeoDa Center for Geographical Analysis & Computation, led by ASU Regents' Professor Luc Anselin, has just released a new version of its signature software, OpenGeoDa. The software provides a user-friendly interface to implement techniques for exploratory spatial data analysis and spatial modeling. It has been used to better understand issues ranging from health care access to economic development to crime clusters. It is freely downloadable and open-source.

The software is used internationally, with more than 75,000 unique downloads, and lab installations at universities such as Harvard, MIT and Cornell. The new version, OpenGeoDa 1.2.0, provides the most significant enhancements since the first release in 2003.

A key addition in the new version is space-time analysis maps and charts that make it possible to track changes in spatial patterns over time. "For example, a series of maps could plot variations in educational achievement by school district, for a series of years," says Anselin. "An individual map would show clusters of high and low achievement; but adding the dimension of time makes it possible to assess the effect of a policy intervention, by comparing both achievement levels and spatial clusters, before and after the intervention."

Another powerful capability is the real-time link between maps, graphs and statistical summaries of the same data set. For example, researchers have used OpenGeoDa to explore the relation between crime and social deprivation, which turns out to hold in urban but not necessarily in rural areas. Using OpenGeoDa, a cluster of high-crime regions can be selected on a map; and data for various socioeconomic aspects of each region will highlight on a graph. Descriptive statistics for the cluster as distinct from the entire map area will also appear.

The new version of OpenGeoDa can show how these relationships vary over time, and offers live links between the maps and different
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Contact: Barbara Trapido-Lurie
BTL@asu.edu
480-965-7449
Arizona State University
Source:Eurekalert  

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