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GIS (Geographic Information Systems) Buildings. Poly Streams, Line Wells, Point Roads, Line Zoning,Poly MAP SHEETS
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GIS Overview
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What is GIS? GIS (Geographic Information System): computer information system that can input, store, manipulate, analyze, and display geographically referenced (spatial) data to support decision making processes.
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Tools for a GIS Hardware - Computer - Printer / Plotter - Digitizer - Scanner GIS Desktop Software (ESRI, Inc. – ArcView) CAD Software (AutoDesk - AutoCAD) Multimedia (Photos, Video, 3D Models) World Wide Web (ESRI, Inc. – ARCIMS) Personnel
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GIS Data Sources Digitized and Scanned Maps purchased, donated, free (Internet) created by user Data Bases – Tables of data GPS – Global Positioning System accurate locations Field Sampling of Attributes Remote Sensing & Aerial Photography
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Conventional Information Systems Answer the following questions: - Who ? - What ? - When ? - Why ? - How ?
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GIS answers the following Location: What is at...? Condition: Where is it? Trends: What has changed since...? Patterns: What spatial patterns exist? Modeling: What if…? Exploring data using GIS turns data into information into knowledge
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Data Data Data Location Data How Many? – What Kind? – Where? Scale of Data Global to Local Data Presentation Words, Charts, Graphs, Tables, Maps, Photos
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GIS Data Raster Images - grids “pixels” satellite images aerial photos Vector - grids features: points, lines & polygons attributes: size, type, length, etc.
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Databases Not easy to interpret
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Visualizing Data A picture is worth a thousand words
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“Layers” of GIS Data Municipalities
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“Layers” of GIS Data Census Tracts
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“Layers” of GIS Data Lakes and Rivers
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“Layers” of GIS Data Polluting Companies
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“Layers” of GIS Data Schools
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GIS Connects Graphics to Data
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Maps and Databases are Interactive
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Queries and Restrictions
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GIS Turns Data Into Information
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GIS Examples
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GIS Applications Business Site Location, Delivery Systems, Marketing Government Local, State, Federal, Military Economic Development Population Studies, Incomes, Census and Demographic Studies Emergency Services Fire & Police Environmental Monitoring & Modeling Industry Transportation, Communication, Mining, Pipelines, Healthcare Public Health Epidemiology Studies Urban Planning Land Use, Historic studies, Environmental and Conservation Studies, Housing Studies, Crime Analysis PoliticsElections and Reappointment EducationResearch, Teaching Tool, Administration Wherever Spatial Data Analysis is Needed
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Global Example
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Number of AIDS Cases
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AIDS Cases per 10,000 persons
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National Level
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State Level Maps
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Percentage of Uninsured by Age Ages 0-18, 1999 Ages 19 - 64, 1999
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Demographic Studies Brookings Institution Report – Back to Prosperity
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Source: United States House of Representatives http://www.house.gov
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Source: The Washington Post http://www.washingtonpost.com/wp-srv/elections/2004/pa/
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Note the proliferation of schools located in SW Pennsylvania where the majority of Competitive Districts lie. Source: 50States.com http://www.50states.com/college/penn.htm http://www.50states.com/cc/penn.htm Pennsylvania Commission for Community Colleges http://www..pacommunitycolleges.org/content/blogcategory/14/40/ Higher Education Locations
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Census Block Group centroids and 2-Mile buffers around each school. Using this method we can calculate how many people between 18-24 live within 2 miles of each school, and thus approximate how many persons 18-24 live in each Congressional District. Source: U.S. Census 2000 School Location and Census Block Groups By District Competitiveness – 2006
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Competitive and Moderately Competitive Districts for 2006 Election RepresentativeMargin of 2004 VictoryPopulation 18-24 Gerlach6,022151,351 Weldon60,450117,162 Fitzpatrick39,33543,484 Schwartz43,977119,980 Dent56,04240,697 Holden58,20728,135 Sherwood175,87148,964 Source: U.S. Census Washington Post
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Regional Level
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Allegheny County Housing Data Data obtained from U.S. Census
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Children with Elevated Blood Levels Data obtained from U.S. Census and Allegheny County Health Dept Note: Cases aggregated to Census Tracts
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Cases Zoomed to Neighborhoods Data obtained from U.S. Census and Allegheny County Health Dept
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Cases Compared to Income Data obtained from U.S. Census and Allegheny County Health Dept
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Cases by Educational Attainment Data obtained from U.S. Census and Allegheny County Health Dept
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Environmental Analysis
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Neighborhood Level
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Green spaces near Schools
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Aerial Photos Polygon buffer created ¼ and ½ mile around schools Data obtained from PASDA and City of Pittsburgh – City Planning Dept.
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Aerial Photos Zoomed Data obtained from PASDA and City of Pittsburgh – City Planning Dept. Helps identify types of green spaces near schools Ball fields vs. Urban Boulevards
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Food Sources Data source US Census
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Neighborhood Walkability
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Emergency Management Layers
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ESRI To learn more, visit: http://www.esri.com/industries.html
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GIS Lab Overview
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ArcGIS Software ESRI, Inc. http://www.esri.com Desktop GIS - ArcView/ArcMap, ArcView Extensions - ArcInfo, ArcEditor - ArcReader (Free), ArcExplorer (Free) Server GIS - ArcIMS (WEB) - ArcGIS Server Mobile GIS - ArcPAD
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ArcMap
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Layers Shapefiles, databases, aerial images, CAD files Added with the “Add Data” button
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Project Files (.MXD)
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Project Files “Point to” layers Add multiple layers Symbolize layers
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ArcCatalog Importing and exporting map layers Renaming map layers Copying map layers
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Desktop GIS ArcToolbox
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WEB Based GIS ArcIMS - An Internet map server for geopublishing maps, data, and metadata: implementing portals; and leveraging Web services.
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Desktop GIS ArcInfo – used by GIS professionals who build and maintain comprehensive GIS processes. Cartographers Scientists Data administrators or data providers GIS professionals and administrators who import and export data between many sources
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Gistutorial Step by Step Lab Tutorials
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Step by Step Instructions
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Accessing GIS Data GIS Tutorial - CD ROM or CMU Thunderbolt Server - \\thunderbolt.heinz.cmu.edu\lobby\acade mic\90784
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Copy to C:\Drive
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IMPORTANT!!!!! YOU MUST WORK FROM C:\Gistutorial NOT U:\Drive NOT C:\Desktop NOT C:\My Documents
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Saving Homework Files Must save files in C:\Gistutorial\Answers\Assignment1…
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Zip Files Zip all GIS files, Word docs, etc. into one.ZIP file
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Copy ZIP File to \\thunderbolt
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