Key Technology Research on Quality Inspection and Evaluation of Orthoimage Used in China's National Land Survey

Abstract

<p><strong>Abstract.</strong> The third national land survey is based on orthoimages with the results of the second national land survey to investigate the land classification, area and ownership of the national land in order to comprehensively understand the status of land use and land resources changes, and to improve the level of delicacy management for national nature resources. Therefore, an important task to ensure the completion of the third national land survey is to the develop a set of technical methods applicable to the quality inspection on orthoimage of the third national land survey.</p><p>In view of the inapplicability of the existing inspection standards and technical methods of traditional basic surveying and mapping results on the orthoimage quality inspection of the third national land survey, The paper analyzes the orthoimage production characteristics and quality need of the third national land survey, improves the inspection quality elements, sampling strategy, inspection methods, evaluation methods and quality problem handling based on the existing inspection standards and technical methods by pilot, and puts forward the corresponding inspection standards and technical methods to promote the quality inspection of orthoimage on the third national land survey.</p><p>Compared with the traditional method, the application of this method in 2865 inspection of county-level’s orthoimage of the third national land survey which covers the whole china, shows that, its inspection index is more reasonable, the inspection process is more scientific, the inspection efficiency is more efficient, and the direct cost of inspection is saved by 31%.</p>

[Retracted] Analysis of Surveying and Mapping Method of Landownership and Environmental Resources Confirmation Based on GPS Technology

“…It is a basic work to establish the information system in the surveying and mapping method for the confirmation and certification of rural contracted land. However, at present, in China, generally speaking, agricultural and forestry land surveying and mapping and information acquisition are still at a relatively backward stage, and most areas are still at the original measurement level of tape measurement, manual calculation, and manual recording [ 5 , 6 ]. The reason is that on the one hand, some measurement methods are not applicable to the measurement of agricultural and forestry land and that on the other hand, the new technology measurement equipment has the limitations of complex operation [ 7 ], difficult to use, and requiring professional operation.…”