Besides the images and the coordinates of control points, we have the coordinates of the center of each image which have been obtained with AERIAL TRANSPORTED GPS. We begin the Aerial Triangulation process directly at the Digital Restitution. A minimum of three Tie Points are used for the overlap area and six for “the net model” (geometrically, the stable overlap area of two consecutive photographs).

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We use the Socet-Set “MST” software for this process. This package is able to integrate the coordinates of the center of each photograph (Aerial Transported GPS) and those of the control points. The aerial triangulation adjustment method is a fully analytical digital method which provides an adjustment solution to simultaneous line equations that represent all rays of the project's image.

The result includes a report with adjusted coordinates of the terrain of each point of land intersection, as well as the camera's position and the direction's value required to enter into the stereoscopic restitution (X, Y, Z, Omega, Phi, Kappa).