1999. This polygon shapefile contains ice observations in the Arctic region for December 24, 1999. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
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1999. This polygon shapefile contains ice observations in the Arctic region for December 27, 1999. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1999. This polygon shapefile contains ice observations in the Arctic region for December 28, 1999. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1999. This polygon shapefile contains ice observations in the Arctic region for December 29, 1999. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1999. This polygon shapefile contains ice observations in the Arctic region for December 30, 1999. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1939, 1940, 1941, 1942, 1943, 1944, 1945, 1946, 1947, 1948, 1949, 1950, 1951, 1952, 1953, 1954, 1955, 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, and 2009. International Heat Flow Commission, International Association of Seismology and Physics of the Earth's Interior, and Oklahoma State University. Department of Geography. Cartography Service. This point shapefile contains heat flow data for Europe compiled from sources dating from 1939 to 2009. Heat flow is a measure of heat loss across ... International Heat Flow Commission.
1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, and 2001. National Atlas of the United States, Environmental Systems Research Institute (Redlands, Calif.), and Geological Survey (U.S.). This line shapefile represents the federally owned land features (for example, national parkways and wild and scenic rivers) of the United States. ... Environmental Systems Research Institute (Redlands, Calif.).
1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, and 2008. Environmental Systems Research Institute (Redlands, Calif.) and United States. Bureau of Transportation Statistics. This line shapefile represents rural and urban interstate highways. U.S. National Transportation Atlas Interstate Highways is part of the National ... Environmental Systems Research Institute (Redlands, Calif.).
1999. All China Marketing Research Co., Ltd. This polygon dataset represents city boundaries in China from 1999. The attribute table includes the GB codes and names in Chinese and English (Pin... China Data Center, University of Michigan.
1999. All China Marketing Research Co., Ltd. This polygon dataset represents county boundaries in China from 1999. The attribute table includes the GB codes and names in Chinese and English (P... China Data Center, University of Michigan.