CONSTRUCTION TASK REFERENCING

The invention relates to a method, device and system for automatically deriving stationing zones (10) for an electronic measuring and/or marking device (1) in a worksite environment (4). The method comprises a querying of a database (DB) for a construction plan information for the worksite environment (4) and an acquiring of a worksite-task-information of a worksite-task to be executed. The worksite-task-information in particular comprises spatial points (2,13) in the construction plan which have to measured and/or marked to accomplish the worksite-task. It also comprises an acquiring of at least coarse 3D-data of the actual real world worksite environment (4), and a merging of the at least coarse 3D-data and the construction plan information to form an actual state model of the worksite environment (4). According to the invention, an automatic calculating of at least one stationing zone (10) within the actual state model is established, which stationing zone (10) comprise at least one stationing location from which the measuring and/or marking of the spatial points (2,13) are accessible by the device (1) without obstructions.