Definition of gis


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Definition of gis

  1. 1. MODULE 1: INTRODUCTION AND DATA STRUCTUREDefinition of GISWhat is GIS?A geographic information system (GIS) integrates hardware, software, and datafor capturing, managing, analyzing, and displaying all forms of geographicallyreferenced information.GIS allows us to view, understand, question, interpret, and visualize data in manyways that reveal relationships, patterns, and trends in the form of maps, globes,reports, and charts.A GIS helps you answer questions and solve problems by looking at your data in away that is quickly understood and easily shared.GIS technology can be integrated into any enterprise information systemframework.Top Five Benefits of GISGIS benefits organizations of all sizes and in almost every industry. There is agrowing awareness of the economic and strategic value of GIS. The benefits of GISgenerally fall into five basic categories: • Cost Savings and Increased Efficiency • Better Decision Making • Improved Communication • Better Recordkeeping • Managing GeographicallySelected Definition of GIS DoE (1987) A system for capturing, storing, checking, manipulating, analyzing and displaying data which are spatially referenced to the Earth. Aronoff (1989) Any manual or computer based set of procedures used to store and manipulate geographically referenced data. Sumant Diwakar
  2. 2. MODULE 1: INTRODUCTION AND DATA STRUCTURECarter (1989) An institutional entity, reflecting an organizational structure that integrates technology with a database, expertise and continuing financial support over time.Parker (1988) A information technology which stores, analysis, and displays both spatial data.Dueker (1979) A special case of information system where the database consists of observations on spatially distributed features, activities, or events, which are definable in space as points, lines, and areas to retrieve data for ad hoc queries and analyses.Smith (1987) A database system in which most of the data are spatially indexed, and upon which a set of procedures operated in order to answer queries about spatial entities in the database.Ozemoy, Smith and Sicherman (1981) An automated set of functions that provides professionals with advanced capabilities for the storage, retrieval, manipulation and display of geographically located data.Burrough (1986) A powerful set of tools for collecting, storing, retrieving at will, transformaing and displaying spatial data from the real world.Cowen(1988) A decision support system involving the integration of spatially referenced data in a problem-solving environment.Koshkariov, Tikunov and Trofimov (1989) A system with advanced geo-modelling capabilities.Devine and Field (1986) A form of MIS that allows map displays of the general information. Sumant Diwakar