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== USGS Historical Topographic Maps for the Juneau Icefield area == The Juneau Icefield is an geological icefield located just north and east of Juneau, Alaska and continues north to the Skagway, Alaska area. Current research of Climate Change in the field of Glaciology relies upon comparison of historical glacier mass-balance to current conditions. The United States Geological Survey(USGS) historical topographic maps, some more than 65 years old, are useful to a glaciologist in determining glacier change. These maps were provided by the United States Geological Survey (USGS)〔(【引用サイトリンク】title=topoView (beta)- USGS Historical Topographic Maps )〕 and archived to Wikimedia Commons. They are scanned(by the USGS) images of the original paper maps that were published from 1948 to 1997. The information contained in the table below was transcribed from the paper map images displayed in the Image Array. Notes AK Skagway B-1 359204 1951 63360 geo.pdf|Skagway B-1 (1951) AK Atlin B-8 354104 1960 63360 geo.pdf |Atlin B-8 (1960) Blank_Page.pdf| Blank_Page.pdf| Blank_Page.pdf| Blank_Page.pdf| AK Skagway A-1 359184 1951 63360 geo.pdf|Skagway A-1 (1951)) AK Atlin A-8 354103 1960 63360 geo.pdf |Atlin A-8 (1960) AK Atlin A-7 354101 1960 63360 geo.pdf|Atlin A-7 (1960) Blank_Page.pdf| Blank_Page.pdf| Blank_Page.pdf| AK Juneau D-4 356371 1951 63360 geo.pdf|Juneau D-4 (1951)) AK Juneau D-3 356366 1953 63360 geo.pdf|Juneau D-3 (1953) AK Juneau D-2 356365 1997 63360 geo.pdf|Juneau D-2 (1997) AK Juneau D-1 356361 1960 63360 geo.pdf|Juneau D-1 (1960) Blank_Page.pdf| Blank_Page.pdf| Blank_Page.pdf |Juneau C-4 AK Juneau C-3 356349 1996 63360 geo.pdf |Juneau C-3 (1996R) AK Juneau C-2 356344 1960 63360 geo.pdf |Juneau C-2 (1960) AK Juneau C-1 356342 1960 63360 geo.pdf |Juneau C-1 (1971R) AK Taku River C-6 359505 1995 63360 geo.pdf |Taku River C-6 (1995) AK Taku River C-5 359504 1960 63360 geo.pdf |Taku River C-5 (1960) Blank_Page.pdf |Juneau B-4 AK Juneau B-3 353867 1949 62500 geo.pdf |Juneau B-3 (1949) AK_Juneau B-2 353866 1949 62500 geo.pdf |Juneau B-2 (1949) AK Juneau B-1 356327 1997 63360 geo.pdf |Juneau B-1 (1997) AK Taku River B-6 359499 1994 63360 geo.pdf |Taku River B-6 (1994) AK Taku River B-5 359498 1951 63360 geo.pdf |Taku River B-5 (1951) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「USGS Historical Topographic Maps for the Juneau Icefield area」の詳細全文を読む スポンサード リンク
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