Scientific big data and Digital Earth

Big data has been a focus of research in sci- ence, technology, economics, and social studies. Many countries have already incorporated big data research into their national strategies. This paper elaborates upon the origin, connotation, and development of big data from both a spatial and temporal perspective. It proposes that scien- tific big data will become a new solution in scientific research as the paradigm changes from being model-driven to data-driven. This paper defines the concept of ＂scientific big data＂ and proposes strategies for solving ＂big data problems＂. Theoretical frameworks and data systems for Digital Earth are discussed with a clear conclusion that scientific big data is a prominent feature of Digital Earth. As an example, spatial cognition of the formation mecha- nism of China＇s Heihe-Tengchong Line--a geo-demo- graphic demarcation line dividing China into two parts--is discussed within the context of big data computation and analysis for Digital Earth.     

亚米级高分辨率卫星遥感数据处理与应用服务系统

一．项目概况 进入21世纪，对地观测与数字地球技术已成为全球最具挑战性和广泛带动性的前沿科技领域之一，我国每年采购国际高分辨率卫星数据额度几十亿元，