Aerotriangulation

Aerotriangulation (AT) is the process of transferring ground control values (usually obtained in the field by surveyors or through GIS/GPS systems) to points on a block of overlapping (stereo) imagery by determining the mathematical relationship between the photographs and known ground control points. This process will ensure that all data extracted from the imagery meets a predetermined accuracy.

The outcome of the triangulation process is a fixed relationship between the aerial camera, the imagery, and the ground control coordinate system.

Aerotriangulation verifies the accuracy of field-surveyed control and provides general economic advantages in large projects. Whilst it is still possible to do "traditional" film diapositive aerotriangulation, we prefer to use ORIMA Orientation Management software from Leica Geosystems. It allows the efficient processing of large image data set coordinates, ground control points and airborne GPS coordinates.

Imagery is obtained through the capture of aerial photography by film or digital camera, and Vekta operates a fleet of aircraft for this purpose. For more information on our air operations, visit the aerial photography section of our website.