Method of 3D referencing, comprising: capturing, from a first camera perspective, at least four homologous points of at least one object in a first picture; capturing, from a second camera perspective, the at least four homologous points (12a, 12b, 12c, 12d, 12a', 12b', 12c', 12d') in a second picture; obtaining a 2D ortho-depiction in a region in which the at least four homologous points (12a, 12b, 12c, 12d, 12a', 12b', 12c', 12d') are located; registering the at least four homologous points (12a, 12b, 12c, 12d, 12a', 12b', 12c', 12d') in the first picture in the 2D ortho-depiction, the positions of points in the 2D ortho-depiction being known, so that in the step of registering the at least four homologous points (12a, 12b, 12c, 12d, 12a', 12b', 12c', 12d'), positional information of the registered four homologous points (12a, 12b, 12c, 12d, 12a', 12b', 12c', 12d') is obtained; transforming the 2D ortho-depiction to a camera perspective identical to the first camera perspective so as to obtain a virtual view of the 2D ortho-depiction; the step of transforming the 2D ortho-depiction including a substep of determining points of intersection of lines of vision of the image contents of the first picture with image contents in the 2D ortho-depiction; reconstructing 3D positions of the at least four homologous points (12a, 12b, 12c, 12d, 12a', 12b', 12c', 12d') on the basis of the first and second pictures in a camera coordinate system, and 3D-reconstructing objects to which the at least four homologous points (12a, 12b, 12c, 12d, 12a', 12b', 12c', 12d') belong, determining 3D/3D correspondences by superimposing the virtual view of the 2D ortho-depiction by a space that was created during 3D-reconstructing. capturing, from a first camera perspective, at least four homologous points of at least one object in a first picture; capturing, from a second camera perspective, the at least four homologous points (12a, 12b, 12c, 12d, 12a', 12b', 12c', 12d') in a second picture; obtaining a 2D ortho-depiction in a region in which the at least four homologous points (12a, 12b, 12c, 12d, 12a', 12b', 12c', 12d') are located; registering the at least four homologous points (12a, 12b, 12c, 12d, 12a', 12b', 12c', 12d') in the first picture in the 2D ortho-depiction, the positions of points in the 2D ortho-depiction being known, so that in the step of registering the at least four homologous points (12a, 12b, 12c, 12d, 12a', 12b', 12c', 12d'), positional information of the registered four homologous points (12a, 12b, 12c, 12d, 12a', 12b', 12c', 12d') is obtained; transforming the 2D ortho-depiction to a camera perspective identical to the first camera perspective so as to obtain a virtual view of the 2D ortho-depiction; the step of transforming the 2D ortho-depiction including a substep of determining points of intersection of lines of vision of the image contents of the first picture with image contents in the 2D ortho-depiction; reconstructing 3D positions of the at least four homologous points (12a, 12b, 12c, 12d, 12a', 12b', 12c', 12d') on the basis of the first and second pictures in a camera coordinate system, and 3D-reconstructing objects to which the at least four homologous points (12a, 12b, 12c, 12d, 12a', 12b', 12c', 12d') belong, determining 3D/3D correspondences by superimposing the virtual view of the 2D ortho-depiction by a space that was created during 3D-reconstructing.