Grand Portage National Monument Aerial Imagery 1940
National Park Service. 2025. Grand Portage National Monument Aerial Imagery 1940
Historical black and white imagery collected, scanned, and georeferenced for Grand Portage National Monument.
- Type
- Imagery
- Authors
- Kirschbaum, Al
- Date of Issue
- 2025-07-03
- Publisher
- National Park Service
- Units
- GRPO
- Keywords
- aerial imagery, airphoto, Cook County, Grand Portage National Monument, GRPO, Minnesota