CGI - Geographic Referencing

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• What is Geographic Referencing?
All geographic data, by definition, has some sort of geographic referencing to help identify its location in the world.

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Geographic Referencing

• Establishing and Modifying PRs, Mile Points and Point IDs PDF icon
PR's refer to continuous linear roadway segments in the transportation system or to the numbers that represent them or to the idealized graphic lines in a GIS system that represent them.

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Addresses

• USPS Abbreviations PDF icon
Click here for lists of state, street suffix, and secondary unit designators.

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	Quick Links
•	Map Michigan
•	National States Geographic Information Council
•	Great Lakes Information Network
•	Urban and Regional Systems Association
•	Association of American Geographers
•	American Society for Photogrammetry & Remote Sensing
•	Geospatial Information & Technology Association
•	Federal Geographic Data Committee
•	U.S. Geological Survey
•	U.S. Environmental Protection Agency
•	U.S. Census Bureau
•	Natural Resource Conservation Service