GIS DEMO

 

http://donar.umiacs.umd.edu/install.htm

http://donar.umiacs.umd.edu/quadtree/

 

term:

 

GIS:

Short for Geographic Information Systems,tools used to gather, transform, manipulate, analyze, and produceinformation related to the surface of the Earth. This data may exist asmaps, 3D virtual models, tables, and/or lists.

 

GISs can be as complex as whole systems that use dedicated databases and workstations hooked up to a network, or as simple as "off-the-shelf" desktop software.

 

GISs play an important role in many organizations. For instance, policeand fire departments may use GISs to locate landmarks and hazards, plotdestinations, and design emergency routes. GISs may also be used bygovernments, research institutes or any other body that can't possiblyhandle the task of manually processing large amounts of geographicaldata.

 

Spatial Data:

Also known as geospatial data or geographic information it is the data or information that identifies the geographic location of features and boundaries on Earth, such as natural or constructed features, oceans, and more. Spatial data is usually stored as coordinates and topology, and is data that can be mapped. Spatial data is often accessed, manipulated or analyzed through Geographic Information Systems