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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

Image Rectification

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Image rectification is a transformation process used to project multiple images onto a common image surface. It is used to correct a distorted image into a standard coordinate system. It is used in computer stereo vision to simplify the problem of finding matching points between images. And it is used in geographic information systems to merge images taken from multiple perspectives into a common map coordinate system. Stereo vision uses triangulation based on epipolar geometry to determine distance to an object. Between two cameras there is a problem of finding a corresponding point viewed by one camera in the image of the other camera. In most camera configurations, finding correspondences requires a search in two dimensions. However, if the two cameras are aligned to have a common image plane, the search is simplified to one dimension - a line that is parallel to the line between the cameras. Image rectification is an equivalent alternative to this precise camera alignment. It transforms the images to make the epipolar lines align ... 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?

This is a type of topographical space constructed by the joining of points, line segments, triangles and their n-dimensional counterparts.

  1. Simplicial complex
  2. Vector product format
  3. Triangulation

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