For the implementation of geodetic measurements connection points in a superordinate system are necessary. The totality of these connection points forms a geodetic basic- or fixed point-network.
The accomplishment encloses the investigation of existing fixed points of the land survey, planning of portal networks, marking of new - and affirmation of new and existing fixed points - above ground and underground, implementation of network measurements in the portal areas and advances, evaluation of measurements. The result is a preferably tension free basic network.
