V-GIS Glossary,

Posted on Jul 2, 2007 By : Mizake Laziaf
This glossary is a sub-set of one developed by the Urban and Regional Information
Systems Association (URISA)


Vector
Method for storing spatial data involving assigning coordinates for each entity.
  1. Mathematical object with precise direction and length but without specific location. Vector data is stored as XYZ coordinates that describe points, symbols, lines, areas, and volumes.
  2. Method for storing spatial data involving assigning coordinates for each entity; an X,Y,Z for a point, a pair of such points for a line, a series of such lines for a polygon, the method is very useful for modeling discrete physical features.
  3. Quantity, such as velocity, completely specified by a magnitude and a direction.
Viewer
A read-only stand-alone software system that supports the display, manipulation, and query of spatial databases. Commercial products that enable users reference and analyzed spatial databases prepared by a full function read-write product within the same product line. A viewer typically has a user interface simpler than full function products; it supports a rich command set but less than that available in the full function product.


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