Northern Great Plains Land Use

1920 - 2000

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This project is part of the Great Plains Population and Environment Project and Andrew Dunlop’s Ph.D. dissertation research. To compare changing agricultural land use on either side of the Canada-U.S. border during the 20th century, Dunlop collected a sequence of aerial photos from the archives, some dating as early as the 1920s. Bringing the land cover information revealed by these photos into a historical GIS allowed him to track evolving land use patterns across 80 years at sample sites in Montana, North Dakota, Alberta, and Saskatchewan.