Defining Suitable Areas by Selection, Exclusion, Buffering and Overlay - Main Users / Purpose
|Technical staff, regional, urban or sectoral planners.|
Many different criteria and factors can be used to assist decision-makers in actually reaching a decision. Very complex issues may be based on different factors, variables or criteria. A considerable amount of information may be available in digital form and may also be available in a GIS. The GIS allows the planner to overlap different pieces of information in order to generate additional information that can be of use for the decision-makers.
For example, if population data is available then this can be depicted on a map. The map may depict population densities, or depict where population growth rates are highest and so on. Whatever information is available digitally and can be referenced to a map can be depicted using the Geographic Information System (GIS).
Assuming, that GIS data are available, suitable map features can be found using different techniques:
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