Geoscience Reference
In-Depth Information
Fig. 19.2
Visualization of
solution to a coverage
problem
to various criteria and, in the case of dynamic location models, monitor how the
solution evolves over time. Finally, an effective visualization through GIS may help
identify deficiencies of the solution that would otherwise have been difficult to
detect. Typical examples are shown in Murray (
2005
) and Alexandris and Giannikos
(
2010
) where the Set Covering Location Problem and the Maximal Covering
Location Problem respectively are solved with respect to a certain geographical area
which is divided into polygonal regions.
As shown in Fig.
19.2
, taken from Alexandris and Giannikos (
2010
), the solution
corresponding to 13 available facilities leaves large areas uncovered and also
provides coverage to areas outside of the geographical area that must be covered.
These obvious deficiencies may lead the decision maker and the analyst to alter the
solution or even to modify the underlying model altogether in order to obtain more
satisfactory solutions.
19.4.3
Formulation of New Models
The linkages between GIS and location science have progressed far beyond data
generation and visualization of results. On a more theoretical note, the data handling
