A Spatial Decision Support System (SDSS) for Electoral Districting

Components of the SDSS

The following components were used to compute the constituency boundaries in the Kenya and South African examples:

The p-median location-allocation model


The model is solved by selecting p districts, defined as nodal centers and their assigned enumeration areas.  The model is solved by an algorithm that minimizes the function Z.

Data items to implement location-allocation models

Four data items for each enumeration area :

The Objective Function

Copyright © 2001 by Joel D. Barkan, Paul Densham and Gerard Rushton