The tabular data associated with this selection can be analyzed in parallel with standard statistical methods. Conversely, tabular selection processes can be applied to these tables such as all features with value x, and the linkage between this table and the spatial data allows an immediate map to be created of the selected records. The GIS can automatically calculate point and line elevation data into contour maps, slope, aspect, watershed and related analytical interpretations of terrain, for 3-D display on terminals or other devices. 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. Inc. All rights reserved.