2005. Geological Survey (U.S.). This point shapefile contains the locations and attributes of significant, historic earthquakes that caused deaths, property damage, and geological... National Atlas of the United States.
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2006. United States. Agricultural Research Service. This polygon shapefile portrays the spread, by year, of the Africanized honey bee (AHB) in the United States, Puerto Rico, and the U.S. Virgin Isla... National Atlas of the United States.
2005. Geological Survey (U.S.). This polygon shapefile portrays the state boundaries of the United States, and the boundaries of Puerto Rico and the U.S. Virgin Islands. The map l... Geological Survey (U.S.).
2011. The data provided shows the changes in temperature for the 2050s/2080s relative to the 1970-1999 base period. The changes are averaged across the 1...
2005. National Atlas of the United States. This polygon shapefile portrays the time zones of the United States, Puerto Rico, and the U.S. Virgin Islands. Also included are the Greenwich Mean... National Atlas of the United States.
2005. National Atlas of the United States. The Topographic and Bathymetric Shaded Relief of North America map layer shows depth and elevation ranges using colors, with relief enhanced by sha... National Atlas of the United States.
1875. United States Coast Survey. 1 map : col., mounted on cloth ; 22 cm in diam., on sheet 56 x 48 cm Relief shown by contours. "C. S. Pierce, Assistant in charge of party." "3030.".
2011. United States. Bureau of Transportation Statistics. This data set includes cities in the United States, Puerto Rico and the U.S. Virgin Islands. These cities were collected from the 1970 National Atl... U.S. Geological Survey.
2004. National Atlas of the United States. This point shapefile includes Holocene volcanoes, which are those thought to be active in the last 10,000 years, that are within an extended area o... National Atlas of the United States.