2002. National Atlas of the United States. The color conterminous United States shaded relief data were derived from National Elevation Dataset (NED) data, and show the terrain of the conter... National Atlas of the United States.
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1998. This polygon shapefile contains ice observations in the Arctic region for December 1, 1998. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).
2016. United States. Department of Housing and Urban Development. Public Housing was established to provide decent and safe rental housing for eligible low-income families, the elderly, and persons with disabiliti... United States. Department of Housing and Urban Development.
1990. This polygon shapefile contains ice observations in the Arctic region for May 14, 1990. This layer is part of the Arctic Climate System (ACSYS) His... Arctic Climate System (ACSYS).
1994. This polygon shapefile contains ice observations in the Arctic region for December 19, 1994. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1991. This polygon shapefile contains ice observations in the Arctic region for January 21, 1991. 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.
2016. Clementz, Michael. See Edition 2 (https://maps.apps.pgc.umn.edu/antarctica/20/17) for the most recent version of this map.; Series: PGC 1:1,000,000 Air Operations Pla... Polar Geospatial Center.
2017. Clementz, Herried. 1:1,000,000 Air Operations Map in collaboration with SCAGI. See the SCAR Map Catalogue (https://data.aad.gov.au/aadc/mapcat/) for the rest of the m... Polar Geospatial Center.
1995. This polygon shapefile contains ice observations in the Arctic region for April 10, 1995. This layer is part of the Arctic Climate System (ACSYS) H... Arctic Climate System (ACSYS).