Geography Reference
In-Depth Information
to particular locations. For example, we may wish to determine which depot may
make deliveries of goods to which particular areas within a maximum travel time limit
(using information on road distances and perhaps other impedance factors such as
average travel time). Information on supply and demand levels may be used to determine
the maximum catchment area of a facility (see Birkin
et al.
(1996) for a summary).
Approaches to solving the location-allocation problem may be used to help ascertain
if a service provider can meet the needs of a given area or if a new facility (e.g. a hospi-
tal or a retail outlet) might be needed or existing facilities expanded. Chang (2008)
provides an introduction to location-allocation modelling with several examples.
Case study
6.8
As in most other chapters, this chapter concludes with a case study that can be conducted
using standard GIS sot ware. h e data are provided on the topic website so that
Start
End
0
50
100 m
Figure 6.3
Shortest path between start and end point. The nodes of the network are given
by circles and the start and end points by squares.
Search WWH ::
Custom Search