Irregular site linear drainage ditch and construction method

The invention discloses an irregular site linear drainage ditch and a construction method, and relates to the technical field of drainage ditch construction, and the technical scheme adopted by the invention comprises the following steps: S1, outputting to-be-measured coordinates of a control point and an inspection point, S2, importing the to-be-measured coordinates into a GPS measuring instrument for measurement and point placement, S3, constructing the drainage ditch, and S4, rechecking the positioning precision by an unmanned aerial vehicle. According to the method, the drainage ditch three-dimensional model is created, the positioning surface and the positioning line are selected, the to-be-measured coordinates of the control point and the inspection point are obtained after the positioning line is segmented, the GPS measuring instrument is directly imported, the accuracy of the to-be-measured coordinates of the control point is ensured, and the positioning precision is improved; an unmanned aerial vehic