File:Canada Dispute Change 1930-11-11.png
Norway ceded its long-dormant claim to the Sverdrup Islands to Canada, in exchange for British recognition of Norway's sovereignty over Jan Mayen.
This was built with the shapefiles:
- Territorial Evolution, from the University of Toronto: https://doi.org/10.5683/SP2/IQ7E0X
- Global Islands: https://doi.org/10.5066/P91ZCSGM
- United States maritime borders: https://nauticalcharts.noaa.gov/data/us-maritime-limits-and-boundaries.html
- United States details from the Newberry Library: https://digital.newberry.org/ahcb/
- Canada detailed administrative divisions: https://www12.statcan.gc.ca/census-recensement/2021/geo/sip-pis/boundary-limites/index2021-eng.cfm?year=21