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Something basic about GIS

Something basic about GIS. What is GIS ?. GIS = Geographic Information Systems Three components: Geography – the real world Information – data and information Systems – technologies. A Definition of GIS. GIS = Geographic Information Systems Worboys, 1995:

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Something basic about GIS

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  1. Something basic about GIS

  2. What is GIS ? • GIS = Geographic Information Systems • Three components: • Geography – the real world • Information – data and information • Systems – technologies

  3. A Definition of GIS • GIS = Geographic Information Systems • Worboys, 1995: • A Geographic Information System (GIS) is a computer-based information system that enables one to efficiently capture, store, update, manipulate, analyze, and display all forms of geographically referenced information.

  4. Functions of GIS • Collection • Storage & Management • Retrieval • Conversion • Analysis • Display

  5. Applications of GIS • How GIS can be used: • Infrastructure Management • Transportation Network Routing • Floodplain Management • Emergency Response Planning • Noise Pollution Analysis • Participatory Planning Processes • Jobs/Housing Spatial Balance • and more …

  6. Administrative Boundaries Utilities Zoning Buildings Parcels Hydrography Streets Digital Orthophoto The GIS Data Model • Data Organized by Layers/Themes

  7. The GIS Data Model Layers Integrate Using Explicit Location on the Earth’s Surface

  8. Types of GIS Data • Describes Objects In Terms Of: • Spatial Data • Absolute X,Y Coordinates – Locations • Size, and Shape • Attributes • Characteristics associated with Geography

  9. GIS Associates Spatial and Attribute Data in a Geo-Referenced Database ARC INFO 1 3 ID AREA PERIM CLASS LANDUSE 1 260210 20688 100 Single Family 2 18210 20688 100 Multi Family 3 260210 20688 100 Commercial 4 258876 16880 200 Forest 5 3008 88 500 Water 5 2 4

  10. Introduction to ArcGIS • ArcGIS is a software program , used to create, display and analyze geospatial data , developed by Environmental Systems Research Institute (ESRI) of Redlands, California. • http://www.esri.com/

  11. ESRI’s ArcGIS Platform • Suite of Three Integrated Applications: • ArcCatalog • ArcMap • ArcToolbox

  12. Components of ArcGIS • ArcCatalog is used for browsing for maps and spatial data and managing spatial data, viewing and creating metadata. • ArcMap is used for visualizing spatial data, performing spatial analysis and creating maps to show the results. • ArcToolboxis an interface for accessing the data conversion and analysis function that come with ArcGIS.

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