Method for acquiring pre-drawn shot point of towline exploration navigation

The invention relates to the technical field of offshore oil seismic exploration technology, in particular to a method for acquiring a pre-drawn shot point of towline exploration navigation. The method comprises the following steps: respectively converting geodetic coordinates of a measuring line starting point and a measuring line end point into corresponding measuring line coordinates; calculating a measuring line grid azimuth; calculating the planar projection coordinate of the pre-drawn shot point; converting the planar projection coordinate of the obtained pre-drawn shot point into a geodetic coordinate of the pre-drawn shot point, and judging whether the process is finished. Another method comprises the steps: calculating a geodesic line azimuth of a measuring line; calculating the geodetic coordinate of the pre-drawn shot point; converting the geodetic coordinate of the pre-drawn shot point into a planar projection coordinate; judging whether the process is finished. The method for acquiring the pre-drawn shot point of the towline exploration navigation has the advantages of being concise, efficient and high in algorithm precision and avoiding the influence of errors.