ch05 - Chapter 5: Finding GIS Resources Learning and Using...

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Chapter 5: Finding GIS Resources Learning and Using Geographic Information Systems: ArcExplorer Edition
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  Learning and Using Geographic Information Systems: ArcExplorer Edition 2 Objectives Learn about free maps and data available from the U.S. Census Bureau and ESRI Discover other sources of map layers and data Download U.S. Census maps and data tables Download TIGER/Line maps and data tables Process downloaded layers in ArcExplorer
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  Learning and Using Geographic Information Systems: ArcExplorer Edition 3 Free Resources on the Internet There are more than 10 million GIS Web sites on the Internet ArcExplorer can only process and display shapefile-format maps and event themes in ArcExplorer Other sites that provide formats, such as ArcInfo coverages or ArcInfo E00 export format, will require translations from a full-featured GIS
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  Learning and Using Geographic Information Systems: ArcExplorer Edition 4 U.S. Census Bureau Map Layers and Data Census Bureau started building a map infrastructure in the late 1970s and early 1980s Census mapping needs were twofold: To assign census employees to areas of responsibility, covering the entire country and its possessions To report and display census tabulations by area; officials determined that the smallest area needed for these purposes is a city block or its equivalent
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  Learning and Using Geographic Information Systems: ArcExplorer Edition 5 U.S. Census Bureau Map Layers and Data (continued) Census Bureau officials decided to compile all line features that could be used to create a block layer for the entire country Map features smaller than blocks—such as deeded land parcels, building outlines, street curbs, and parking lots—are the responsibility of local governments
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  Learning and Using Geographic Information Systems: ArcExplorer Edition 6 TIGER/Line® Files Topologically Integrated Geographic Encoding and Referencing files Census Bureau’s product for digital mapping of the U.S. TIGER maps are available for the entire U.S. and its possessions, and the maps include geographic features such as roads and streets, railroads, rivers, lakes, political boundaries, and census statistical boundaries
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  Learning and Using Geographic Information Systems: ArcExplorer Edition 7 TIGER/Line® Files (continued) Census statistical boundaries include the following: Census tracts Areas averaging 4,000 population Census tracts are neighborhoods
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This note was uploaded on 07/11/2011 for the course MIS 658 taught by Professor Dr.d during the Spring '11 term at Our Lady of Holy Cross College.

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ch05 - Chapter 5: Finding GIS Resources Learning and Using...

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