Approach and practice: integrating earth observation resources for data sharing in China GEOSS

Earth observation data sharing is an essential part of the data lifecycle and plays a critical role in Earth science research. Existing industry data sharing systems are affected by restrictions in distributed resource management and tightly coupled service interoperability. These systems currently offer no support for facilitating cross-disciplinary exploration and application. The lack of a national data sharing infrastructure has led to reduced international cooperation. These barriers are common and have hindered the development of the Global Earth Observation System of Systems (GEOSS). The China GEOSS Data Sharing Network (China GEOSS DSNet) has been proposed as a part of China's Plan for Implementing GEOSS (2016-2025) to address the above issues. In this research, we designed a national GEOSS data sharing framework, including resource integration mechanism, sharing-oriented metadata standards, and lightweight interoperability service to coordinate various Earth observation resources. So far, more than 29 million archived satellite metadata records and 200 TB of high-quality satellite datasets have been integrated under this framework. The results were demonstrated in the following applications: domestic satellite archived metadata query service, international Earth observation resource sharing service, and disaster emergency response service.