Abstract
Abstract. Satellite orthophotos are important data sources and results of China's third national land survey, and their quality profoundly affects the accuracy of the survey results. This article reviews the quality requirements and quality models of satellite orthophotos for the purpose of land survey in conjunction with the quality inspection and evaluation of satellite orthophotos covering the entire land area of China, and analyzes the shortcomings of current orthophotos quality evaluation methods. On the basis of this method, a multilevel fuzzy comprehensive evaluation method was introduced to test the orthophotos quality evaluation, and the concepts of maximum membership effectiveness index and evaluation grade probability were used to constrain the evaluation results. The results prove that the method is more effective than the current method true and accurate.
Highlights
Satellite orthophotos are important data sources and results of China's third national land survey, and their quality profoundly affects the accuracy of the survey results
The results show that the weight setting fully reflects the special requirements for the image quality of the project application, and takes into account the need for location accuracy; the fuzzy comprehensive evaluation method is generally upgraded by a level compared with the evaluation results of the GB/T 18316 method
The minimum score system will be subject to evaluation bias due to the abnormal influence of indicators of general factors; the deviation ratio, single-valued distribution probability method, and relative validity index can effectively evaluate the principle of maximum membership; the overall quality of the orthographic image of the third national land survey satellite is Excellent to meet the quality requirements of project design
Summary
The China's third national land survey used remote sensing, surveying and mapping, geographic information, and the internet to investigate the ownership and use rights of various types of land nationwide. Satellite orthophotos are important data sources and results of China's third national land survey. They are the positioning reference and statistical basis for land survey. They determine the accuracy of the third land survey and the progress of subsequent operations. This paper analyzes the quality of satellite orthophotos covering the entire land area of China, and conducts corresponding research on the methods of inspection and evaluation the quality of satellite orthophotos for the application of land survey
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