Tóm tắt:

Control network construction and deformation monitoring system works is the specialized network of surveying works, with much higher precision than mapping grid. The handling of data networks requires ensuring two basic requirements: one is, the net must be positioned in the same coordinate system (or height) was selected in the previous stage; secondly, not to give the wrong number of the original data, or transfer of the original point exists in the adjustment results. To ensure there are two requirements, the best solution is to apply the indirect method adjustment conditions attached to the network calculation and adjustment. Theoretical research and empirical calculations in the article will shed light on this issue.