The Geodetic Calculation Service (GCS) is an OGC compliant web processing service (WPS). GCS provides several calculation routines based on FAA order 8260.58, such as Direct, Inverse and Intersection. As a result of the calculations GCS offers a range of processes for retrieving and validating geographical aeronautical data. The calculations take into account magnetic variation based on the World Magnetic Model (WMM). GCS supports data processing in AIXM 5.1 format.
Version 1.0 of the GCS comprised the Route Segment Validation process. It calculates the true track, magnetic track and length of the route segments of a route and validates it against the data provided in an AIXMBasicMessage.