Gravity reference frames

A gravity reference frame is represented by points on the ground, with accurately determined gravity values. Such points can be used as control points for new relative gravity surveys.

Different gravity reference frames

There have been four fundamental gravity reference frames in Sweden, which have been used during different time periods and to different extents. The names of the reference frames originate from the time of the measurements, but the latest one, RG 2000, is named after the postglacial land uplift epoch to which it is related. The different reference frames are based on different sets of points, methods of surveying and instruments. New gravity measurements are being performed continuously to improve the knowledge of the gravity field.

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