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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

Universal Transverse Mercator Coordinate System

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The Universal Transverse Mercator (UTM) coordinate system is a grid-based method of specifying locations on the surface of the Earth that is a practical application of a 2-dimensional Cartesian coordinate system. It is used to identify locations on the earth, but differs from the traditional method of latitude and longitude in several respects. The UTM system is not a single map projection. The system instead employs a series of sixty zones, each of which is based on a specifically defined secant transverse Mercator projection. The Universal Transverse Mercator coordinate system was developed by the United States Army Corps of Engineers in the 1940s. The system was based on an ellipsoidal model of the Earth. For areas within the conterminous United States, the Clarke 1866 ellipsoid was used. For the remaining areas of the Earth, including Hawaii, the International Ellipsoid was used. Currently, the WGS84 ellipsoid is used as the underlying model of the Earth in the UTM coordinate ... 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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GIS Trivia

Can you survive our GIS Trivia Challenge?

A method of representing relief on a map to show orientation of slope and steepness by means of thickness and density is?

  1. Hachure map
  2. Topographic map
  3. Dufour map

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