The national gravity network, LSN2004, is based on the existing Swiss National Gravity Network (SG95), which was introduced during the period from 1992 to 1994. The field observations and data adjustments were carried out by the Geodesy and Geodynamics Lab (GGL) at the Federal Institute of Technology, Zurich at the request of the Swiss Geodetic Commission (SGC) and the Swiss Geophysical Commission (SGPC).

This network was extended by various additional stations and is being continuously supplemented with new absolute and relative measurements, which are being carried out in cooperation with the Federal Institute of Metrology (METAS).

LSN2004 consists of the existing absolute stations in Switzerland, the new absolute stations of LSN2004 and some absolute gravity stations in the neighbouring countries as connection points. Together with 12 stable levelling bench marks and 5 main points of the national network, LV95, they form the Swiss first order gravity network.

The rest of the main points of the LV95 network represent the second order gravity network.

The points of LSN2004 are used as reference points for the relative gravity observations in precise levelling and for the gravimetric survey.

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