1937 Photo Mosaic - Pool 15
收藏DataONE2016-10-29 更新2024-06-26 收录
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资源简介：
The U.S. Geological Survey's Upper Midwest Environmental Sciences Center (UMESC) has obtained historical photography of the Upper Mississippi River, collected by the Corps of Engineers in the 1930s. The Center uses these photos in their training program for GIS interns, to provide them with experience in georeferencing photos. Whenever enough photos are georeferenced that a mosaic can be created, the data are made available through the center's Internet site. The 1937 photo mosaic for Mississippi River Navigation Pool 15 was created using 1:20,000-scale black-and-white photos collected during September 1937.
创建时间：
2016-10-29
