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GEOGRAPHIC INFORMATION SYSTEMS

What is GIS?. Geographic Information Systems is a computer system capable of capturing, analyzing, and displaying geographically referenced information. A high-tech equivalency of a map.. Data Comes in Three Basic Types. Spatial data are made up points, lines, and areas in every GIS.Points repr

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GEOGRAPHIC INFORMATION SYSTEMS

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    1. GEOGRAPHIC INFORMATION SYSTEMS

    2. What is GIS? Geographic Information Systems is a computer system capable of capturing, analyzing, and displaying geographically referenced information. A high-tech equivalency of a map.

    3. Data Comes in Three Basic Types Spatial data are made up points, lines, and areas in every GIS. Points represent anything that can be described as an x,y location on earth, such as shopping centers, utility poles, banks, etc. Lines represent anything having a length, such as streets, highways, and rivers. Areas represent anything having boundaries, whether natural, political, or administrative, such as boundaries for countries,

    4. Data Comes in Three Basic Types Tabular Data is information describing a map feature. List, spreadsheets, or database information such as those used by businesses to keep up with customer information. Points can be plotted to show different locations. Sales data can be linked with postal locations to allow for map volume in areas.

    5. Data Comes in Three Basic Types Image Data uses images to build maps. It is a quick way to get spatial data for a large area and is more cost and time effective than collecting layers of data. Is very diverse One file or layer, can’t be broken down. Includes satellite images, aerial photographs, and scanned data.

    6. GIS Data Models GIS consist of two types of data model. Vector data models represents each feature as a row in a table and shapes defined by location in space. Raster Data model represents a matrix of cells in continuous space, each layer representing one attribute. They are cell based spatial datasets.

    7. Vector Data Model Vector data is split into three types: Polygon- most commonly distinguished using color schemes, patterns, or color graduation. Line (or arc)-used to represent linear features, such as, road centerlines and hydrology. Point data is used to represent nonadjacent and abstract figures, such as schools, points of interest, or city locations or place names (abstract).

    8. Vector Data Model Example of Vector data can be the address of a customer, the spot a crime was committed, or any point having geographic coordinates.

    9. Raster Data Model Raster data models are: Thematic Spectral Pictures

    10. Raster Data Model Example of Raster data such as vegetation types and elevation.

    11. Why use GIS? Improve Organizational Integration Make better decisions Mapping

    12. Industries that Use GIS Business Financial Services Real Estate Commercial Business Communications Telecommunications Location based-services Defense Defense and Intelligence

    13. Industries that Use GIS Educators Universities, Colleges, Post Secondary,etc. Libraries and Museums Engineering Civil Surveying Health and Human Services Hospitals and Public and Private Health Systems Human Services

    14. Industries that Use GIS Government Law Enforcement and Public Safety Economic Development State and Local Elections Natural Resources Agriculture and Forestry Mining and Earth Science Marine and Coastal Environmental Management

    15. Industries that Use GIS Transportation Transportation Systems and Networks Logistics and Fleet Management Utilities Electric and Gas Water and Waste Management

    16. Thank You

    17. References erg.usgs.gov.com gis.com esri.com gislounge.com Management Information Systems Effy Oz, 3rd Edition

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