Chapter 19: Legal Issues and Law Enforcement
Vertical air photos record situations that exist at a specific time and are particularly useful in recording changes if a sequence of photos of the same area exists. Property boundaries are difficult to define if they fall along a naturally changing feature such as a river channel. Three examples illustrate the legal problems that can arise.
Rivers have traditionally been used as boundaries between various administrative units: municipalities, counties, provinces, states, and even countries. However, they are unsatisfactory administrative boundaries because they change position over time resulting in ownership disputes.
19.10: Land Dispute on the Banks of the Assiniboine River, Southwest of Portage la Prairie, 1989 Photograph
Figure 19.10, a 1989 photo, shows the city of Portage la Prairie 1, the Trans-Canada Highway bypassing the city to the south 2, and the Southport airfield 3. The Assiniboine River 4 flows from southwest to east across the area. As part of a flood control scheme to protect both Portage la Prairie and Winnipeg, a dam 5 has been built across the river to deflect water into the Portage Floodway 6 at times of high flow. It is noticeable that the river channel is wider behind the dam 7 than it is downstream from it 8. A dispute arose over compensation for land that was flooded as a result of the building of the dam. The area concerned is bounded by a dashed line.
Figure 19.10: Land Dispute on the Banks of the Assiniboine River, Southwest of Portage la Prairie, 1989 Photograph
Vertical air photograph: MB89021-6-182
Flight height: lens focal length:
Scale: 1:57,600 (approx.)
Location: Township 11, Range 7W1
Map sheets: 1:250,000 62G Brandon
1:50,000 62G/16 Portage La Prairie