Accession Number : ADA268536


Title :   Directional Regions in Geographic Information Systems (GIS)


Descriptive Note : Scientific paper,


Corporate Author : ARMY TOPOGRAPHIC ENGINEERING CENTER FORT BELVOIR VA


Personal Author(s) : Caldwell, Douglass R ; Graff, Linda H


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a268536.pdf


Report Date : 03 Aug 1993


Pagination or Media Count : 10


Abstract : While direction is fundamental to geography, the implementation of directional functions in Geographical Information Systems (GIS) is limited. The focus paper is the extension of direction-related concepts through the definition of directional regions, such as the area north of Washington DC. Directional regions are constructed from combinations of six elements: the feature, the reference, an orientation, a viewspan, a viewfield and a region of interest. This approach allows users to create new area features which can be incorporated in a GIS. These features are a valuable tool for geographical analysis, since they further constrain reasoning on a data set.... Geographical analysis, Geographic Information Systems (GIS).


Descriptors :   *INFORMATION SYSTEMS , *GEOGRAPHY , TOOLS , REASONING , APPROACH , DIRECTIONAL , REGIONS , SYSTEMS APPROACH


Subject Categories : Cartography and Aerial Photography
      Computer Systems


Distribution Statement : APPROVED FOR PUBLIC RELEASE