| | This technique is commonly used to supplement the number of photo control points within a block or strip of photographs. Depending on the photo scale of the photography, which is determined by the contractual contour interval of the project, a minimum of photo control points per site are surveyed. The spread and location of the photo control is designed to establish a basic frame to which the aerial triangulation network of computer generated control points can be anchored within the expected positional and elevation accuracy. |
