| 摘要 |
The invention relates to a marking device having at least one projection device, which defines a vertical axis and at least one laser unit equipped to emit a first laser plane and a second laser plane, wherein the first laser plane and the second laser plane are inclined relative to each other and disposed such that they intersect along a first line of intersection, the first line of intersection being perpendicular to the vertical axis. According to the invention, the projection device comprises a base element and a projection element comprising the at least one laser unit, wherein the projection element can be positioned relative to the base element, in particular in a motor-driven manner. The invention further relates to a system for surveying a surface, comprising a projection device, which defines a vertical axis and comprises at least one laser unit equipped to emit a first laser plane and a second laser plane, wherein the first laser plane and the second laser plane are disposed such that they intersect along a first line of intersection, the first line of intersection being perpendicular to the vertical axis, and further comprising a detection device for determining the distance between the two laser planes along a measuring line. |
