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1. Maryland County Boundary Files, 1860-1880

1999. Louisiana State University (Baton Rouge, La.).; Dept. of Geography and Anthropology., Earle, Carville., Heppen, John., and Otterstrom, Samuel. The features represent the county boundaries in Maryland from the years 1860-1880. The Historical United States County Boundary Files 1790 - 1999 (...

2. Maryland County Boundary FIles,, 1890-1910

1999. Louisiana State University (Baton Rouge, La.).; Dept. of Geography and Anthropology., Earle, Carville., Heppen, John., and Otterstrom, Samuel. This shapefile contains county boundaries for Maryland for the years 1980-1910. The Historical United States County Boundary Files 1790 - 1999 (or...

3. Maryland Major Roads 2002

1999. Geographic Data Technology, Inc. (GDT). Maryland Major Roads represents interstate, U.S., and state highways and other major thoroughfares within Maryland. Environmental Systems Research Institute, Inc. (ESRI).