Surface surveying device for determining 3D coordinates of a surface

A surface surveying device, for determining a multiplicity of 3D coordinates of measurement points on a surface, comprising:

• a scanning unit for optically scanning the surface with optical, coherent and collimated measurement radiation having at least one deflection direction and for detecting the measurement radiation reflected by a respective measurement point,
• means for determining a position and orientation of the scanning unit,
• a carrier for carrying the scanning unit and at least part of the means for determining a position and orientation,
• a control and evaluation unit with a surface surveying functionality for controlling the scanning unit and for determining the 3D coordinates of the measurement points on the basis of the respective deflection direction and a distance value derived by means of detected measurement radiation,
• wherein:
• the carrier is embodied as an unmanned aerial vehicle which is capable of hovering and comprises a lead, the latter being connected at one end thereof to the aerial vehicle and being designed to be held at the other end by a user,
• the lead is provided for guiding the aerial vehicle in the air by the user by hand, and
• the position of the aerial vehicle in the air is predetermined by the effective length of the lead, said length being changeable by the user, and
• the lead is electrically conductive and serves for:
• energy supply;
• and/or
• control signal transmission and/or data signal transmission,
• to and/or from parts of the surface surveying device situated in the air.