Something basic about GIS

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Something basic about GIS
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What is GIS ?

• GIS Geographic Information Systems
• Three components
• Geography the real world
• Information data and information
• Systems technologies

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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.

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Functions of GIS

• Collection
• Storage Management
• Retrieval
• Conversion
• Analysis
• Display

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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

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The GIS Data Model

• Data Organized by Layers/Themes

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The GIS Data Model

• Layers Integrate Using Explicit Location on the
  Earths Surface

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Types of GIS Data

• Describes Objects In Terms Of
• Spatial Data
• Absolute X,Y Coordinates Locations
• Size, and Shape
• Attributes
• Characteristics associated with Geography

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GIS Associates Spatial and Attribute Data in a
Geo-Referenced Database
ARC
INFO
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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
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2
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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/

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ESRIs ArcGIS Platform

• Suite of Three Integrated Applications
• ArcCatalog
• ArcMap
• ArcToolbox

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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.
• ArcToolbox is an interface for accessing the data
  conversion and analysis function that come with
  ArcGIS.