Surveying system and auxiliary measuring instrument

A method for surveying and/or marking points on an object on the basis of planned positions for purposes of constructional activities, with the steps of

• setting up a stationary surveying device at a first known positioning in a surrounding area of the object, wherein the surveying device has
• a base,
• a targeting unit, in particular a telescopic sight, which defines a target direction (x) and can be pivoted with respect to the base about at least one axis (y, z), in particular two axes orthogonal to one another,
• a beam source, in particular a laser source, for generating radiation and also an optical unit for emitting the radiation as a free beam in the target direction, wherein the free beam serves for surveying and/or marking object points,
• at least one angle meter and also an angle-measuring functionality for measuring the target direction (x), and
• a controller with single-point determining functionality,
• a memory, in which input or surveyed positions can be stored, in particular as part of a plan of a building or room,
• retrieving from the memory a set of object points of the object to be surveyed and/or to be marked,
• surveying and/or marking from the first positioning (P1) object points of the set of object points that can be surveyed and/or can be marked from the first positioning (P1) by means of the free beam, on the basis of the target direction (x),
• ascertaining missing object points of the set of object points,
• relocating the surveying device to a second, unknown positioning (P2) in the surrounding area of the object,
• automatically determining the second positioning (P2) by the surveying device on the basis of the knowledge of the first positioning (P1), so that the second positioning (P2) is known,
• surveying and/or marking missing object points by means of the free beam from the second positioning (P2).