1978. This polygon shapefile contains ice observations in the Arctic region for September 27, 1978. This polygon shapefile contains ice observations in t... Arctic Climate System (ACSYS).
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1978. This polygon shapefile contains ice observations in the Arctic region for September 29, 1978. This polygon shapefile contains ice observations in t... Arctic Climate System (ACSYS).
1978. This polygon shapefile contains ice observations in the Arctic region for September 6, 1978. This polygon shapefile contains ice observations in th... Arctic Climate System (ACSYS).
1978. This polygon shapefile contains ice observations in the Arctic region for September 8, 1978. This polygon shapefile contains ice observations in th... Arctic Climate System (ACSYS).
1978. This polygon shapefile contains ice observations in the Arctic region for October 6, 1978. This polygon shapefile contains ice observations in the ... Arctic Climate System (ACSYS).
1978. This polygon shapefile contains ice observations in the Arctic region for October 4, 1978. This polygon shapefile contains ice observations in the ... Arctic Climate System (ACSYS).
1978. This polygon shapefile contains ice observations in the Arctic region for September 13, 1978. This polygon shapefile contains ice observations in t... Arctic Climate System (ACSYS).
1978. This polygon shapefile contains ice observations in the Arctic region for September 15, 1978. This polygon shapefile contains ice observations in t... Arctic Climate System (ACSYS).
1978. This polygon shapefile contains ice observations in the Arctic region for September 22, 1978. This polygon shapefile contains ice observations in t... Arctic Climate System (ACSYS).
1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, and 1994. King, Philip B., Arndt, Raymond E., Schruben, Paul G., Bawiec, Walter J., and Beikman, Helen M. This polygon shapefile shows the boundaries of geologic units within the United States. This layer is part of the Geologic Map of the United States... Geological Survey (U.S.).