Abstract
Abstract. The state attaches great importance to the issue of the right to the use of rural land. At present, China is carrying out a large-scale mapping and confirmation of rural house sites and rural houses. The traditional measurement method mainly adopts total station or RTK manual measurement method, which is characterized by high work intensity, complex operation procedure and labor-consuming. There are hundreds of thousands of villages in China. With the development of science and technology, it is an inevitable trend to use new technologies in rural cadastral surveys to improve their efficiency and quality. LiDAR scanning technology has the advantages of high efficiency, flexibility, reliability, and high accuracy, which meet the requirements of tasks and schedules that are difficult to complete with traditional measurement methods. This paper is based on the AS-300H multi-platform LiDAR system of Huace Navigation, which integrates UAV and vehicle LiDAR for cadastral surveying and mapping. It proves that LiDAR using in rural cadastral mapping has low labor intensity, high efficiency and accuracy. At the same time, the advantages and disadvantages of LiDAR technology for cadastral mapping are also summarized and elaborated, which has a good reference and significance for those who are currently conducting rural housing and cadastral mapping work.
Highlights
At present, in order to promote the reform of the rural property rights system, China is carrying out large-scale investigations, mapping, and ownership confirmation and registration of rural homesteads and houses (Independent Multidisciplinary Science Team, 2012)
3.3.1 Point Cloud Data Processing: Because the same Light Detection and Ranging (LiDAR) equipment is used on the unmanned airborne vehicle (UAV) and the vehicle, the processing methods and processes of the LiDAR data collected by the UAV flight and the LiDAR data collected by the vehicle are completely the same
The plane error of 17 points is less than 5cm, the plane error of 8 points is 5-10cm, and the plane mean square error is ± 0.047m, which fully meets the requirements of cadastral surveying and mapping specifications
Summary
In order to promote the reform of the rural property rights system, China is carrying out large-scale investigations, mapping, and ownership confirmation and registration of rural homesteads and houses (Independent Multidisciplinary Science Team, 2012). Due to the use of high-precision POS system and very low flight altitude, and the integration of UAV and vehicle LiDAR methods to carry out rural cadastral mapping, the accuracy of the results can fully meet the accuracy requirements of 1:500 rural cadastral mapping. The application to the foundation surveying and mapping work helps to better grasp the geographic element information of the target to be measured, as well as the coordinates of the boundary point of the land ownership boundary, and provides an important basis for formulating related strategies. 2. ADVANTAGES AND APPLICATION PROCESS OF LIDAR SURVEY TECHNOLOGY IN RURAL CADASTRAL MAPPING. (1) LiDAR technology has low requirements for light, and can collect data during the day and night It can make full use of the evening work with better weather and improve the efficiency of data acquisition;. (4) The boundary of the house is presented in the form of a vector point cloud, which can more intuitively determine the position of the wall and reduce the judgment process
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