Elevation, slope and aspect are critical factors in the growth and success of many species and habitats. The ability to present any data set as 3-D patterns combined with geography is an important analytical and visualization tool. Network refers to how linear features are connected together, like roads or streams. Network software tools allow paths to be followed through such networks according to any attribute such as blockage, flow rate, toxicity, etc. These tools are important in modelling migration routes and stream flows.
Relation refers to the unlimited possibilities for associating tabular data with spatial features.
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