Presentation on Geographical Information Systems
- 1. Geographical Information System (GIS) Basic concepts
- 2. Arc/Info ArcGIS Application areas: https://gis.usc.edu/blog/how-mapping-is-used-by-nasa-applications-of-gis-in-space/ WIDELY USED COMMERCIAL SOFTWARE
- 3. Geographical representation of real world phenomena What is there at the earth surface? (Landuse/Landcover) Where it is? (locational information)
- 4. Geographical representation of real world phenomena In terms of •Their position with respect to a known co- ordinate system •Their attributes that are unrelated to position •Their interrelationships with each other which describes how they are linked together
- 5. Where did GIS come from? • GIS is built upon knowledge from geography, cartography, computer science and mathematics • Geographic Information Science is a new interdisciplinary field built out of the use and theory of GIS
- 7. Definition 1: A GIS is a toolbox "a powerful set of tools for storing and retrieving at will, transforming and displaying spatial data from the real world for a particular set of purposes" (Burrough, 1986, p. 6). "automated systems for the capture, storage, retrieval, analysis, and display of spatial data." (Clarke, 1995, p. 13).
- 8. Definition 2: A GIS is an information system "An information system that is designed to work with data referenced by spatial or geographic coordinates. In other words, a GIS is both a database system with specific capabilities for spatially- referenced data, as well as a set of operations for working with the data" (Star and Estes, 1990, p. 2).
- 9. Dueker's 1979 definition (p. 20) has survived the test of time. "A geographic information system is a special case of information systems where the database consists of observations on spatially distributed features, activities or events, which are definable in space as points, lines, or areas. A geographic information system manipulates data about these points, lines, and areas to retrieve data for ad hoc queries and analyses" (Dueker, 1979, p 106).
- 15. Functions of a GIS software • Data input and verification • Data storage and database management • Data output and presentation • Data transformation • Interaction with the user
- 19. Application areas in business management • In finding out the perfect geographical location for their company and industry • Can assist the emergency management teams in locating correct address • Can help insurance company to fix policy price in flood prone area, earth-quake prone area etc • Retail & facility management
- 35. R G B W Y C M