Abstract
Abstract. The current status of insufficient research on production technology and quality inspection methods for uncontrolled mapping of block adjustment results for global project. This paper proposes a set of quality inspection process and technical methods for large-scale production, lack of field checkpoints and difficult to verify in the field based on the analysis of the characteristics of the results: First, analyze the quality elements and inspection contents to be inspected, determine the inspection methods for different inspection contents; Then, extract items that can be automatically checked or need to be verified the production process data, establish inspection rules, implement batch automatic inspection and production data verification for some check items; study the inspection methods for the remaining items and implement human-computer interaction check. Finally, 4 test-fields were checked and the results showed that the technical route proposed in this paper is feasible, and the quality evaluation results are objective and reliable.
Highlights
The global project which is mainly for the construction and maintenance of global geographic information resources
Compared with the traditional block adjustment, global project block adjustment is based on China's independent highresolution remote sensing satellite as the main data source, using high-precision mapping technology to build a large-scale block without GCP
Traditional quality inspection methods have been unable to meet the requirements for the inspection of block adjustment for large-scale and without GCP
Summary
The global project which is mainly for the construction and maintenance of global geographic information resources. Block adjustment is one of the key results of global projects. Compared with the traditional block adjustment, global project block adjustment is based on China's independent highresolution remote sensing satellite as the main data source, using high-precision mapping technology to build a large-scale block without GCP. The global project block adjustment results mainly have three characteristics. Wide range: The global project plans to complete the construction of about 60 million square kilometers of high-resolution data resources along the Belt and Road and key African regions from 2016 to 2020, the construction of 149 million square kilometers of global geographic information resources will be completed until 2025. High quality requirements: The global project is to carry out large-scale production of DOM, DEM, DSM, and core vector products on the basis of block adjustment without GCP, the block adjustment results produced by mapping without GCP technology are the production basis for all the results of the entire global project, the quality of block adjustment is the quality basis of all results.Third, difficult to obtain field checkpoints: The main production scope of global projects is abroad, and the production measurement area lacks field points and it is difficult for field inspections.By analyzing the characteristics of the block adjustment of the global project, this paper puts forward a set of technical methods and a process for quality inspection which is suitable for large-scale production and lacking field inspection points based on the actual inspection
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