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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

Contour Line

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A contour line, of a function of two variables, is a curve along which the function has a constant value. In cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. A contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness of slopes. The contour interval of a contour map is the difference in elevation between successive contour lines. More generally, a contour line for a function of two variables is a curve connecting points where the function has a same particular value. The gradient of the function is always perpendicular to the contour lines. When the lines are close together the length of the gradient is large: the variation is steep. ... 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: AutoCarto 2014
Location: Pittsburgh, Pennsylvania, USA
Date: 10/5/2014

Event: AutoCarto 2014
Location: Pittsburgh, Pennsylvania, USA
Date: 10/5/2014

Event: AutoCarto 2014
Location: Pittsburgh, Pennsylvania, USA
Date: 10/5/2014

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GIS Trivia

Can you survive our GIS Trivia Challenge?

What is the process of changing an image from a vector format to a pixel-based format?

  1. Rasteration
  2. Bit mapping
  3. Ray Tracing

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