The credibility of remote sensing spatial data is a key information that supports the success of major national space missions such as aerospace science exploration and satellite Earth observation. It is also an international research frontier issue in this field. Taking the early deep space exploration missions internationally as an example, the success rate of the 'Entry, Descent, and Landing (EDL)' critical process, which highly relies on the credibility of remote sensing spatial information, is only 50%. Developing new theoretical methods and key technologies for the credibility of remote sensing spatial information aimed at major space engineering projects has become an urgent need to ensure the implementation of national space strategies. This achievement addresses the key problems that need to be solved in the practical application of remote sensing spatial information credibility theory in major space engineering projects. It focuses on quality control throughout the entire process of obtaining, processing, and applying remote sensing spatial data, and constructs a theoretical method for the credibility of remote sensing spatial information in major space engineering projects. A model for the credible measurement of static elements in space exploration scenarios, a method for the credible processing of spacecraft dynamic data, and technology for the credible assessment of massive remote sensing spatial data products have been established. 1. The problem of achieving measurement-grade detection precision under extremely short imaging time conditions for the Chang'e series laser three-dimensional imaging system has been solved, with its ranging accuracy improved from decimeter level to better than 4.5 centimeters, allowing for high-credible detection of obstacles in landing areas larger than 0.2 meters. 2. The issue of credible assessment for massive spatial data products based on a secondary sampling evaluation optimization model has been addressed, achieving global precision assessment of the 30-meter resolution global land surface coverage remote sensing data products developed in China. 3. The problem of high-precision mapping under satellite platform vibration conditions has been solved, achieving a minimum detection capability of 0.1 pixel satellite vibration amplitude, ensuring stable on-orbit operation and monitoring of satellite vibrations as well as high-precision mapping. The project achievements have ensured the safe landing of Chang'e-3, high-precision mapping by the high-resolution stereoscopic survey satellite, and high-quality imaging for manned space missions such as Tianzhou-1 shortwave infrared hyperspectral remote sensing. They have also been applied in more than 10 fields including geology, land resources, disaster prevention and mitigation, military affairs, etc., in more than 300 units and played an important role. They have promoted the industry's technological level based on quality credible space data, reaching international leading levels in terms of credible measurement of spatial data, reliable processing of precise geometric remote sensing, and credible control of data quality.