GEOG 2090 Final: Exam Study Notes
5 Jul 2016
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Document Summary
Data: record of facts, actual or predicted, pertaining to entities and phenomena in the real world. Information: the meaning intrinsic in, and derived from data. System: a set of entities, objects or procedures with structure and functions, organized harmoniously for the attainment of particular objectives. Information system: set of operations or procedures performed on raw data to extract meaning useful in decision-making. Geographical information system (gis): a particular kind of information system applied to geographical data. Main differentiating factor from other information systems: the. Main purpose of gis: support decision-making related to spatially-distributed entities in the geographical space. The point of connection is geography (ie. location, proximity, interaction, spatial distribution, pattern analysis) Use spatial data (eg. cad systems, drafting packages, imaging, graphics) Perform some form of spatial analysis (eg. tomography, cat scans in medicine, etc. ) Gis includes the ability to perform spatial operations on geographically-referenced data. In practice: fix one mode, vary the other and measure the third.
