What datum are the shapefiles in?
Each shapefile contains a .prj file that contains the geographic information system (GIS) industry standard well-known text (WKT) format to describe the coordinate system/projection/datum information for each shapefile. This enables users to easily import the shapefiles into their local coordinate system. All of the 2008 and 2009 TIGER/Line Shapefiles are in GCS NAD83, and each .prj file contains the following: GEOGCS[“GCS_North_American_1983”,DATUM[“D_North_American_1983”,SPHEROID[“GRS_1980”,6378137,298.257222101]],PRIMEM[“Greenwich”,0],UNIT[“Degree”,0.017453292519943295]] In the 2007 TIGER/Line Shapefiles, the following areas had not gone through the NAD83 transformation process and were still within local astronomical datums: Hawaii County, Honolulu County (all areas except Oahu Island), Kalawao County, Kauai County, and Maui County in Hawaii; Eastern District, Manu’a District, Rose Island, Swains Island, and Western District in American Samoa; Guam; Northern Islands Municipality, R
Each shapefile contains a .prj file that contains the geographic information system (GIS) industry standard well-known text (WKT) format to describe the coordinate system/projection/datum information for each shapefile. This enables users to easily import the shapefiles into their local coordinate system. All of the 2008, 2009, and 2010 TIGER/Line Shapefiles are in GCS NAD83, and each .prj file contains the following: GEOGCS[“GCS_North_American_1983”,DATUM[“D_North_American_1983”,SPHEROID[“GRS_1980”,6378137,298.257222101]],PRIMEM[“Greenwich”,0],UNIT[“Degree”,0.017453292519943295]] In the 2007 TIGER/Line Shapefiles, the following areas had not gone through the NAD83 transformation process and were still within local astronomical datums: Hawaii County, Honolulu County (all areas except Oahu Island), Kalawao County, Kauai County, and Maui County in Hawaii; Eastern District, Manu’a District, Rose Island, Swains Island, and Western District in American Samoa; Guam; Northern Islands Municipa
