QUALITY INSPECTION AND EVALUATION OF SATELLITE ORTHOPHOTOS IN CHINA'S THIRD NATIONAL LAND SURVEY
- 1National Quality Inspection and Testing Center for Surveying and Mapping Products, Beijing, China
- 2China Transport Telecommunications &Information Center, Beijing, China
- 3Zhejiang No.1 Surveying and Mapping Institute, Hangzhou, China
Keywords: China's Third National Land Survey, Satellite Orthophotos, Quality Evaluation, Fuzzy Comprehensive Evaluation, Quality Characteristics, Check Content
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.