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Wiki.GIS.com - The GIS Encyclopedia

Wiki.GIS.com is an encyclopedia dedicated to geographic information systems (GIS).

This repository incorporates contributions from the GIS community for the benefit of GIS professionals, students, and anyone with an interest in GIS. The wiki contains informative articles about GIS concepts, new technologies, products, people, and organizations.

Anyone who has any knowledge of GIS is more than welcome to create an account and start sharing that information by creating new pages or expanding existing pages.

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Featured Content

Symbology

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Symbology is defined in geographic information systems (GIS) as the set of conventions, rules, or encoding systems that define how geographic information is represented with symbols on a map. A characteristic of a map feature may influence the size, color, and shape of the symbol used. Generically, a symbol is something such as an object, picture, written word, sound, or particular mark that represents something else by association, resemblance, or convention. For example, a red octagon may be a symbol for ""STOP"". On maps, crossed sabres may indicate a battlefield. Numerals are symbols for numbers (amounts). All language consists of symbols. Personal names are symbols representing individuals. Maps typically include symbols that represent such features as streets, buildings, streams, and vegetation. Features are shown as points, lines, or areas, depending on their size and extent. Many features are shown by lines that may be straight, curved, solid, dashed, dotted, or in any combination. ... more

Exclusive Content

System Design Strategies

System Design Strategies is an exclusive resource for the successful design and deployment for geographic information systems technology. This documentation is provided to share system architecture design methodology and the fundamental principles that contribute to system performance and scalability.

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Event: bd
Location: san antonio
Date: 9/23/2014

Event: Esri Latin America User Conference
Location: Royal Palm Plaza - Campinas, Sao Paulo, Brasil
Date: 9/25/2014

Event: Esri Latin America User Conference
Location: Royal Palm Plaza - Campinas, Sao Paulo, Brasil
Date: 9/25/2014

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GIS Trivia

Test your knowledge of GIS

Name a method used by GPS devices to compute exact location based on signals received from a satellite and the time that signal takes to get from the satellite to the receiver?

  1. Trilateration
  2. Triangulation
  3. Derivation

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