Application Of The GPS Technology In The Modern Cadastral Survey

GPS technology has a broad prospect in modern cadastral survey. Due to themerits such as the high accuracy, no accumulation errors, continuously all-weatherpositioning and no limitations of time and inter-visibility conditions, GPS technologyis widely used in the control survey and detail survey of open country. With the rapiddevelopment of the national economy, high precision remeasure of the current landuse and the location and ownership of the land attachments is needed. The applicationof GPS technology in the modern cadastral survey completely changes the operationmethod of the traditional cadastral survey. The measurement accuracy is improvedand the operating speed is greatly improved as the same time.In this dissertation, the basic and mapping control of horizontal control survey inthe modern cadastral survey and the static and dynamic survey of GPS technology areanalyzed. The theoretical and applied research of GPS technology in the moderncadastral survey is carried out.Combined with the urban digital cadastral survey project, application method ofGPS in the basic and mapping control survey is studied. The concretely analysis onthe implementation of field work and the process of indoor data is carried out and theapplication conditions of GPS in cadastral detail survey are analyzed. During thecourse of field data acquisition of GPS, the siting and monumentation requirements ofthe control points are discussed and the points for attention are put forward accordingto the concrete requirements of GPS network. Factors influencing the precision ofdata acquisition and methods of improving observation precision are discussed duringthe course of the actual measurement of GPS control network. Meanwhile the courseof indoor data processing including the establishment of the project, the setting of thecoordinate, the calculation of GPS base line, the adjustment of the network, thegeneration of the reports and the precision of the adjustment are also analyzed.Conditions suitable for the application of GPS to acquire data in the cadastral detailsurvey are showed and the data acquired by means of GPS are repeated capturing bymeans of total station in this dissertation. The comparison results well verify thepossibility of GPS application in the cadastral detail survey.The significance of GPS technology on modern cadastral survey is clearlypresented in this dissertation. The value of GPS technology in the modern cadastralsurvey is affirmed by the theoretical analysis, organization implementation scheme and the data analysis model established to process the measured data and analyze thedata precision in the basic control, mapping control and detail survey.