System for planning an earth-moving operation to be performed by a construction machine, the construction machine having a tool for performing the earth-moving operation and a machine control unit for at least partially controlling the earth-moving operation, the system comprising - a measuring system configured for capturing three-dimensional measuring data of an uneven terrain in a surrounding of the construction machine in at least a first detection range; - a context camera having a known position relative to the measuring system and/or the three-dimensional measuring data and being configured for capturing context image data of the terrain within the first detection range; - a user interface configured for displaying at least one context image based on the context image data to an operator of the construction machine, and for receiving user input from the operator of the construction machine, the user input being interpretable as or comprising a selection of pixels of the context image; and - a computing unit operatively coupled at least with the measuring system and the user interface, characterized in that the computing unit is configured for - generating, based on the three-dimensional measuring data, a three-dimensional terrain model of the terrain within the first detection range, - interpreting the user input as a selection of pixels of the context image; - mapping, taking into consideration the known relative position of the context camera, the selection of pixels to a surface of the three-dimensional terrain model; - determining 3D coordinates on the surface based on the mapping; and - providing the 3D coordinates to the machine control unit for at least partially controlling the earth-moving operation based on the 3D coordinates. - a measuring system configured for capturing three-dimensional measuring data of an uneven terrain in a surrounding of the construction machine in at least a first detection range; - a context camera having a known position relative to the measuring system and/or the three-dimensional measuring data and being configured for capturing context image data of the terrain within the first detection range; - a user interface configured for displaying at least one context image based on the context image data to an operator of the construction machine, and for receiving user input from the operator of the construction machine, the user input being interpretable as or comprising a selection of pixels of the context image; and - a computing unit operatively coupled at least with the measuring system and the user interface, - generating, based on the three-dimensional measuring data, a three-dimensional terrain model of the terrain within the first detection range, - interpreting the user input as a selection of pixels of the context image; - mapping, taking into consideration the known relative position of the context camera, the selection of pixels to a surface of the three-dimensional terrain model; - determining 3D coordinates on the surface based on the mapping; and - providing the 3D coordinates to the machine control unit for at least partially controlling the earth-moving operation based on the 3D coordinates.