GEO 301 Lecture Notes - Lecture 4: Floor Area (Building), Voronoi Diagram, Distance Decay
17 Sep 2012
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Document Summary
Based on newtonian gravitational principles, it explains how large urbanized areas attract customers from smaller rural communities. This simple gravity model is a modification of reilly"s law of retail gravitation. The method uses size and distance of the retail centres in order to compute the trade area. Together these two variables are thought to adequately measure the relative utility of the centre which is seen to decrease with distance and increase with size. Size measures could be: number of stores, square footage of the centre, number of employees, number of parking spaces etc. Determining the distance customer is willing to travel to get to store. These level of attractiveness vary amongst people store y will have a smaller trade area because vs. store x that level of attractiveness. For shopping centres, stores and towns that vary in size. If they are the same size then the application of this model will produce the same result as the thiessen polygon method.
