词条 | USGS Historical Topographic Maps for the Juneau Icefield area | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
释义 |
USGS Historical Topographic Maps for the Juneau Icefield areaThe Juneau Icefield is a 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)[1] 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.
See also
References1. ^{{cite web|url=http://ngmdb.usgs.gov/maps/TopoView/|title=topoView (beta)- USGS Historical Topographic Maps|author=USGS - NGMDB|work=usgs.gov}} 2. ^http://ims.er.usgs.gov/gda_services/download?item_id=5662972 3. ^http://ims.er.usgs.gov/gda_services/download?item_id=5662976 4. ^http://ims.er.usgs.gov/gda_services/download?item_id=5662978 5. ^http://ims.er.usgs.gov/gda_services/download?item_id=5667448 6. ^http://ims.er.usgs.gov/gda_services/download?item_id=5667462 7. ^http://ims.er.usgs.gov/gda_services/download?item_id=5667476 8. ^http://ims.er.usgs.gov/gda_services/download?item_id=5667504 9. ^http://ims.er.usgs.gov/gda_services/download?item_id=5667508 10. ^http://ims.er.usgs.gov/gda_services/download?item_id=5667510 11. ^http://ims.er.usgs.gov/gda_services/download?item_id=5667542 12. ^http://ims.er.usgs.gov/gda_services/download?item_id=5667546 13. ^http://ims.er.usgs.gov/gda_services/download?item_id=5667556 14. ^http://ims.er.usgs.gov/gda_services/download?item_id=5667568 15. ^http://ims.er.usgs.gov/gda_services/download?item_id=5673042 16. ^http://ims.er.usgs.gov/gda_services/download?item_id=5667452 17. ^http://ims.er.usgs.gov/gda_services/download?item_id=5682525 18. ^http://ims.er.usgs.gov/gda_services/download?item_id=5673618 19. ^http://ims.er.usgs.gov/gda_services/download?item_id=5673620 20. ^http://ims.er.usgs.gov/gda_services/download?item_id=5682531 SourcesMapping SystemsUSGS Historical Maps(HM){{reflist|30em|group=HM}} 5 : Boundary Ranges|Ice fields of Alaska|Ice fields of British Columbia|Bodies of ice of Juneau, Alaska|Tongass National Forest |
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