This manuscript gives an overview of the multipoint method and the development of an easy to use measurementsystem which measures the deformation of large buildings. The multipoint method has previously been tested1, 2and used mainly under controlled laboratory conditions (e.g. indoors). Diculties are introduced when thismethod is used outdoors, mainly because of the increased measurement scale and the uncontrolled environment.Dierences in air pressure due to convection or wind, as well as fog or rain can cause severe perturbations to thelight which propagates towards the sensors. Compared with existing systems, such as laser trackers, our systemdoes not need to scan the building, which leads to much higher temporal resolution, which in turn can be usedto achieve a reduced statistical measurement uncertainty (averaging in time).
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