Main Page

From wiki.gis.com
Jump to: navigation, search

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.

New to Wiki?
Learn how to get involved in the Wiki.GIS community.
Start here

New To Wiki.png

New to GIS?
Learn the basics of Geographic Information Systems.
Start here

New to GIS.png

Featured Content

North American Datum

Triangulation station at Meade's Ranch.jpg
The North American Datum is the official datum used for the primary geodetic network in North America. In the fields of cartography and land-use there are currently two North American Datums in use: the North American Datum of 1927 (NAD27) and the North American Datum of 1983 (NAD83). Both are geodetic reference systems, but each is based on different measurements. The North American Datum of 1927 (NAD27) is a datum based on the Clarke Ellipsoid of 1866. This Ellipsoid was created by way of manual surveying of the entire continent. The geodetic ""center"" of NAD27 is a base station at Meades Ranch in Kansas. Because Earth deviates significantly from a perfect ellipsoid, the ellipsoid that best approximates its shape varies region by region across the world. Clarke 1866, and North American Datum of 1927 with it, were surveyed to best suit North America as a whole. Likewise, historically most regions of the world used ellipsoids measured locally to best suit the vagaries of earth's shape in their respective locales. ... 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.

SDS WikiLogo4.png

GIS Events

  
   
SunMonTueWedThuFriSat
 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
     

No events within range

View all events.png    Add new event.png

GIS Trivia

Can you survive our GIS Trivia Challenge?

What is the historical astronomical instrument used to locate and predict the position of astrological bodies?

  1. Astrolabe
  2. Alidade
  3. Quadrant

View answer.png