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.
New to Wiki? Learn how to get involved in the Wiki.GIS community. Start here
New to GIS? Learn the basics of Geographic Information Systems. Start here
Triangulated Irregular Network
A triangulated irregular network (TIN) is a digital data structure used in a GIS for the representation of a surface. A TIN is a vector based representation of the physical land surface or sea bottom, made up of irregularly distributed nodes and lines with three dimensional coordinates (x,y, and z) that are arranged in a network of nonoverlapping triangles. TINs are often derived from the elevation data of a rasterized digital elevation model (DEM). An advantage of using a TIN over a DEM in mapping and analysis is that the points of a TIN are distributed variably based on an algorithm that determines which points are most necessary to an accurate representation of the terrain. Data input is therefore flexible and fewer points need to be stored than in a DEM with regularly distributed points. While a TIN may be less suited than a DEM raster for certain kinds of GIS applications, such as analysis of a surface's slope and aspect, TINs have the advantage of being able to portray terrain in three dimensions. ... more
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.
Event:Esri Developer Summit Location:Palm Springs, CA Date:3/10/2015 Event:Esri Developer Summit Location:Palm Springs, CA Date:3/10/2015 Event:Esri Developer Summit Location:Palm Springs, CA Date:3/10/2015
Can you survive our GIS Trivia Challenge?
What defines something's existance in physical space that establishes its location in terms of map projections or coordinate systems?