oleh :Surya Afnarius
Prodi Sistem Informasi, Universitas Andalas
Dueker (1979) :
a special case of information systems where the database consists ofobservations on spatially distributed features, activities, or events, which are definable in space as points, lines or areas. " GIS manipulates dataabout these points, lines, and areas to retrieve data for ad hoc queries and analyses.
Ozemoy, Smith, dan Sicherman (1981) :
an automated set of functions that provides profesionals with advancedcapabilities for the storage, retrieval, manipulation, and display of geographycally located data
Burrough (1986) :
a powerful set of tools for collecting, storing, retriving, at will,transforming and displaying spatial data from the real world