GIS Dictionary

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

independent variable

[statistics] One or a set of variables used to model or predict the dependent variable. For example, a prediction of […]

indeterminate flow direction

[network analysis] In networks, a flow direction that is unknown or undiscoverable. Indeterminate flow direction occurs when flow direction cannot

index

[computing] A data structure, usually an array, used to speed the search for records in a database or for spatial

index contour line

On a topographic map, a contour line that is thicker than the rest and usually labeled with the elevation that

index map

[cartography] A schematic map used as a reference for a collection of map sheets, outlining the total area covered along

industry

[organizational issues] An organization with specific GIS needs. Examples of industries include government, transportation, health care, homeland security, and public

INFO database

[ESRI software] A tabular database management system used by ArcInfo Workstation software to store and manipulate attributes of a GIS

information space

[cognition] A geometric representation of relationships between elements in a data domain, in which relative position indicates the degree of

Informix

[non-ESRI software] A commercial relational database management system (RDBMS) supported by ArcSDE.

infrared scanner

[data capture] A device that detects infrared radiation and nverts it into an electrical signal that can be recorded on

infrastructure

[government] The system of human-made physical structures, such as roads, bridges, canals, cables, wires, communications towers, hospitals, pipes, reservoirs, and

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