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Start Over Year 1981 Format Shapefile
1981. This polygon shapefile contains ice observations in the Arctic region for October 19, 1981. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).
1981. This polygon shapefile contains ice observations in the Arctic region for October 26, 1981. This layer is part of the Arctic Climate System (ACSYS)... Arctic Climate System (ACSYS).
1981. This polygon shapefile contains ice observations in the Arctic region for October 6, 1981. This layer is part of the Arctic Climate System (ACSYS) ... Arctic Climate System (ACSYS).
1981. This polygon shapefile contains ice observations in the Arctic region for September 1, 1981. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
1981. This polygon shapefile contains ice observations in the Arctic region for September 15, 1981. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
1981. This polygon shapefile contains ice observations in the Arctic region for September 23, 1981. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
1981. This polygon shapefile contains ice observations in the Arctic region for September 28, 1981. This layer is part of the Arctic Climate System (ACSY... Arctic Climate System (ACSYS).
1981. This polygon shapefile contains ice observations in the Arctic region for September 9, 1981. This layer is part of the Arctic Climate System (ACSYS... Arctic Climate System (ACSYS).
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, and 1991. Instituto Brasileiro de Geografia e Estatística. This point shapefile contains the location of Brasilia, established as the federal capital of Brazil on April 21, 1960, Brasilia superseded Rio de ... Instituto Brasileiro de Geografia e Estatística.
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, and 1998. Patuxent Wildlife Research Center. This line shapefile portrays the current routes used for conducting Breeding Bird Surveys in the lower 48 States. This layer is part of the 1997-20... National Atlas of the United States.