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.
19.1: Meanders on the Assiniboine River Near the Junction with Birdtail Creek, 1945 Photo
On this stretch of the southward-flowing
Figure 19.1: Meanders on the Assiniboine River Near the Junction with Birdtail Creek, 1945 Photo
Vertical air photograph: A7592-34
Flight height: 12,400 feet a.s.l.; lens focal length: 8.25 inches
Date: April 25, 1945
Scale: 1:16,200 (approx.)
Location: Township 15; Ranges 27 and 28WI
Map sheets: 1:250,000 62K Riding Mountain
1:50,000 62K/6 Birtle