Application Research Of GPS On Cadastral Survey

The foundation of Land Management(LM) is Cadastral Survey Manual(CSM), and cadastral survey is the important way of acquiring information of CSM. GPS has become one of the most important measures in cadastral survey for its high accuracy and automation.As to the demands of cadastral survey, some basic methods are introduced firstly, and the technical problems of GPS cadastral control survey are discussed and some reasonable means are put forward based on economy, precision and time. By the analysis of adjustment outcomes of cadastral control survey network and pass point network and comparing the outcomes of GPS with distance measuring instruments, we can prove that GPS can meet the precision demands of cadastral control survey.The possibility of GPS RTK applying to cadastral sectional survey is emphasizedly discussed in this thesis. The effects of all kinds of error resources to positioning precision are analyzed, and some effective measures to alleviate or erase them are put forward. In order to make up the shortcomings of GPS, some integrating measures such as GPS + Total Position Station, GPS + CCD, GPS + Portable Laser Distance Measuring Instrument and etc are given. The experiments demonstrate that the application of GPS RTK to cadastral sectional survey is feasible, especially in open air, it can work faster than any other methods, but in difficulty condition, we can also acquire the satisfactory outcomes if some integrating measures are used.