Great Lakes Aerial Photos of Ice Conditions, Version 1

The collection consists of approximately 50, 000 high-quality negatives and transparencies showing ice cover impact on navigation or hydroelectric operation from 1963 to 1973. Coverage is not systematic or complete. Indexing has not been undertaken, but latitude and longitude of flight line begin and end points are logged. Photos from many flights have been made into photomosaics that can be used on-site as a gross index to the 9-inch roll negatives. Photographic flights were carried out by a U.S. Air Force photomapping wing, using flight lines selected by NOAA Lake Survey Center (now Great Lakes Environmental Research Laboratory).

The analog material that is this data set moved to the University of Colorado (CU) Libraries Archives in August 2018, where it is part of the Roger G. Barry glaciology collection.

If you are interested in this analog collection, you can search for \"Great Lakes Aerial Photos of Ice Conditions\" from the CU search interface, but be aware that it may not yet be catalogued, or it may be catalogued under a different name.If you have questions, contact [e-mail].

本数据集包含约50000份高质量负片与透明正片，拍摄于1963年至1973年间，记录了冰盖对航运与水力发电运营的影响。该数据集的覆盖范围并非系统性或全覆盖的，尚未进行编目，但已记录了飞行航线起止点的经纬度坐标。多次飞行拍摄的照片已被拼接为影像镶嵌图，可在现场作为9英寸卷装负片的概览索引。此次航空摄影由美国空军摄影测绘联队执行，飞行航线由美国国家海洋和大气管理局（NOAA）湖泊勘测中心（现更名为五大湖环境研究实验室）选定。

本数据集的模拟影像资料于2018年8月移交至科罗拉多大学（CU）图书馆档案馆，现为罗杰·G·巴里（Roger G. Barry）冰川学馆藏的一部分。

若您对该模拟影像馆藏感兴趣，可通过科罗拉多大学检索界面搜索"Great Lakes Aerial Photos of Ice Conditions"（五大湖冰情航空影像），但需注意该馆藏可能尚未完成编目，或以其他名称编目。如有疑问，请联系[e-mail]。