无定向测量问题的解决

In order to make full use of the advanced control points with bad visibility, this paper introduce several methods for densification of control points combine with the engineering practice, include GNSS RTK method based on global satellite positioning technology, nondirectional connecting traverse and arbitrary station method based on total station, two-point resection and nondirectional linear triangulation chain based on theodolite. For some densification control points with redundant observation, the coordinates computation can use rigorous adjustment method；for other cases, we can use portable computer program to complete the computation in work site, and even can use Auto CAD diagram to get the results. When using densification control point, checking and verification must be done according to the condition of work site equipment and the existing feature information.