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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

Jenks Natural Breaks Classification

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The Jenks Natural Breaks Classification (or Optimization) system is a data classification method designed to optimize the arrangement of a set of values into ""natural"" classes. This is done by seeking to minimize the average deviation from the class mean, while maximizing the deviation from the means of the other groups. The method reduces the variance within classes and maximizes the variance between classes.[1][2] The Jenks scheme determines the best arrangement of values into classes by iteratively comparing sums of the squared difference between observed values within each class and class means. The best classification identifies breaks in the ordered distribution of values that minimizes within-class sum of squared differences. Cartographers and map makers can utilize the Jenks method to identify break points in a data set by picking the class breaks that best group similar values and maximize the differences between classes. ... 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: Esri Petroleum GIS Conference
Location: George R. Brown Convention Center - Houston, TX
Date: 4/23/2014

Event: Esri Petroleum GIS Conference
Location: George R. Brown Convention Center - Houston, TX
Date: 4/24/2014

Event: Esri Petroleum GIS Conference
Location: George R. Brown Convention Center - Houston, TX
Date: 4/25/2014

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GIS Trivia

Test your knowledge of GIS

This map projection is a sphere that is projected onto a hemisphere of the globe as it appears from deep space.

  1. Orthographic projection
  2. Mercator projection
  3. Gnomic projection

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