_:genid1 . _:genid1 "NmIcEdg2" . _:genid2 . _:genid2 . _:genid2 "90"^^ . _:genid2 "50"^^ . _:genid2 "180"^^ . _:genid2 "-180"^^ . _:genid3 . _:genid3 . _:genid3 "1964-08-28T00:00:00"^^ . _:genid3 "1964-09-22T00:00:00"^^ . "nasa-nsidcdaac-nmicedg2" . "Nimbus Ice Edge Points from Nimbus Visible Imagery L2, CSV"^^ . "10.5067/NIMBUS/NmIcEdg2" . _:genid1 . . "This data set (NmIcEdg2) estimates the location of the North and South Pole sea ice edges at various times during the mid to late 1960s, based on recovered Nimbus 1 (1964), Nimbus 2 (1966), and Nimbus 3 (1969) visible imagery. Data are provided as CSV files. Browse images are also available."^^ . "2014-03-21T00:00:00"^^ . _:genid2 . _:genid3 . . _:genid4 . _:genid4 . _:genid4 . _:genid4 . "oai:nsidc/NmIcEdg2" . "http://nsidc.org/api/dataset/2/oai?verb=GetRecord&metadataPrefix=dif&identifier=oai:nsidc/NmIcEdg2" . .