Aerial Triangulation

                            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.
Sophisticated computer programs handle this process, with very little human intervention except for interpretation and analysis of residual computational values.
GeoGraphix, Inc. does not normally use aerial triangulation on mapping projects requiring one-foot contours.



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