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Map Layer Source
Data Layer File Type Feature Type Source Source File Name Source Link Pub Date Processing Info
Cities shapefile point U.S. Geological Society & U.S. Dept. of Interior -- National Atlas Cities and Towns http://nationalatlas.gov/atlasftp.html 11/6/2000 File was altered by DBED to include only select feature and attribute data.
U.S. Highways shapefile line Federal Highway Administration National Highway Planning Network v.3 http://www.bts.gov/gis/ 1999 File was altered by DBED to include only select feature and attribute data and enhance readability at smaller scales
Interstates shapefile line Federal Highway Administration National Highway Planning Network v.3 http://www.bts.gov/gis/ 1999 File was altered by DBED to include only select feature and attribute data and enhance readability at smaller scales
County (fill) shapefile polygon U.S. Department of Commerce -- Bureau of Census Census Boundary Files - County 2000 http://www.census.gov/geo/www/cob/ 2001 File was altered by DBED to include only select feature and attribute data.
County (line) shapefile polygon U.S. Department of Commerce -- Bureau of Census Census Boundary Files - County 2000 http://www.census.gov/geo/www/cob/ 2001 File was altered by DBED to include only select feature and attribute data.
State (fill) shapefile polygon U.S. Department of Commerce -- Bureau of Census Census Boundary Files - State 2000 http://www.census.gov/geo/www/cob/ 2001 File was altered by DBED to include only select feature and attribute data.
State (line) shapefile polygon U.S. Department of Commerce -- Bureau of Census Census Boundary Files - State 2000 http://www.census.gov/geo/www/cob/ 2001 File was altered by DBED to include only select feature and attribute data.
Water (background) shapefile polygon MD Department of Business & Economic Development Water Background n/a 2001 DBED created shapefile of single polygon for purpose of displaying water.
Water (text) shapefile polygon MD Department of Business & Economic Development Water bodies text bounding polygon n/a 2001 DBED created shapefile of polygons for purpose of identifying water body.