GIS Concepts - 1 2 GIS Databases & Mapping By...

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Unformatted text preview: 1 2 GIS Databases & Mapping By Mohammad Waqas Awan Incharge Comp Lab GIS & RS Center FSR&DP PFI Peshawar 3 Overview GIS Concepts GIS Data Input & Editing Database Concepts & Design Mapping & Co-ordinate System 4 GIS Concepts Evolution of GIS Information Technology Computer Technology Remote Sensing GPS Communication Technology 5 GIS Concepts GIS Definition A powerful set of tools for collecting, storing, retrieving at will, transforming and displaying spatial data from the real world for particular purposes. Any manual or computer based procedures used to store and manipulate geographically referenced data. A system for capturing, storing, checking, manipulating, analyzing and displaying data which are referenced to the Earth. An information technology, which stores, analyzes and display data. Integration of spatial and non spatial data. 6 History of GIS Canada was the pioneer in the development of GIS in early 1960s and the much credit goes to the Roger Tomilson for the early development. Question a GIS can answer Location: What is at..? Condition: Where is it.? Trends: What has changed since? Patterns: What Spatial Patterns exists? Spatial question? GIS Concepts 7 Components of GIS GIS Concepts 8 Components of GIS Hardware Hardware is the computer on which a GIS operates. Software GIS software provides the functions and tools needed to store, analyze, and display geographic information. Data Acquiring geographic data. People Viewers, General Users , GIS spets Methods GIS Concepts 9 Geographic Data Spatial data Point Line Polygon Non Spatial data/Attribute data GIS Concepts 10 Spatial data GIS Concepts Area Point Line Volume 11 Non Spatial/ Attribute data GIS Concepts District Name Area Population Kathmandu 395 sq. km. 6,75,341 Lalitpur 385 sq. km. 2,57,086 Bhaktapur 119 sq. km. 1,72,952 12 GIS Concepts Types of GIS Vector GIS Raster GIS Hybrid GIS Technology is moving towards hybrid GIS Raster Vector Integration 13 Vector Representation Vector Representation GIS Concepts The Vector Data Model Features of Spatial Object Points (Example : Location of house) Lines (Example : Railway) Polygon s (Examples : Forest area) The location of features on the earths surface are referred to map positions using an XY coordinate system (termed a Cartesian Coordinate System)....
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GIS Concepts - 1 2 GIS Databases & Mapping By...

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