1991. U.S. Census Bureau. and GeoLytics, Inc. District boundaries for the 102nd United States Congress, Jan. 3, 1991 to Jan. 3, 1993. Harvard Geospatial Library.
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1999. Bureau of Transportation Statistics, (comp.). The 106th Congressional District Boundaries data set contains geographic information for the political entities of the Congressional districts of t... Bureau of Transportation Statistics.
2000. Harvard Map Collection, United States. National Imagery and Mapping Agency, and Land Info (Firm). This polygon is an index to 1:500,000 scale maps of the world, titled 1:500,000 TPC (Tactical Pilotage Charts) : worldwide US military aviation/top... Harvard Map Collection.
1972. Geological Survey (U.S.). This map layer portrays the 2000 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer was crea... U.S. Geological Survey.
2010. U.S. Census Bureau. Geography Division. This polygon data layer represents the 2010 TIGER/Line census 5-Digit ZIP code tabulation areas for the United States. The TIGER/Line Files are sha...
1730. Harvard Map Collection, Harvard Library, Wit, Frederik de, Ottens, J., 1704-1765, Ottens, R., 1698-1750, and R. & J. Ottens. This layer is a georeferenced raster image of the historic paper map entitled: Accuratissima Europae tabula : multis locis correcta et nuperrime ed... Harvard Map Collection, Harvard Library.
1705. Harvard Map Collection, Harvard Library and Allard, Carel, 1648-approximately 1709. This layer is a georeferenced raster image of the historic paper map entitled: Accuratissima Europae tabula, multis locis correcta, et nuperrimè ed... Harvard Map Collection, Harvard Library.
1611. Harvard Map Collection, Harvard College Library, Hondius, Jodocus, 1563-1612., and Mercator, Gerhard, 1512-1594. This layer is a georeferenced raster image of the historic paper map entitled: Nova Africae tabula, auctore Jodoco Hondio. It was published by Excu... Harvard Map Collection, Harvard College Library.
1637. Harvard Map Collection, Harvard Library and Merian, Matthaeus, 1593-1650. This layer is a georeferenced raster image of the historic paper map entitled: Nova descriptio Africæ. It was published by M. Merian in 1637. Scale... Harvard Map Collection, Harvard Library.
1700. Harvard Map Collection, Harvard College Library and L'Isle, Guillaume de, 1675-1726. This layer is a georeferenced raster image of the historic paper map entitled: L'Afrique, dressee sur les observations de Mrs. de l'Academie royale... Harvard Map Collection, Harvard College Library.