地球系统空间格网及其应用模式

全球变化与地球系统科学研究涉及跨圈层、跨投影带的中-大-超大尺度问题,对全球地学信息系统(GGIS)、全球空间格网(GSG)及数字地球提出了新挑战。在剖析GSG研究现状的基础上,指出需从地球系统整体上设计一个多领域普适的全球三维空间格网———地球系统空间格网(ESSG),以支撑全球变化及地球系统科学研究。结合领域特点,提出了构建ESSG的8项基本要求,并基于球体退化八叉树格网(SDOG)设计并实现了一种满足该要求的SDOG-ESSG模型;介绍了SDOG-ESSG模型在地球系统空间数据集成、三维建模、多尺度表达、对象变化表达、数据检索与云服务、过程模拟及空间环境安全规划与可视化决策等方面的7种典型应用模式。

Earth System Spatial Grid and Its Application Modes

The researches on global change and Earth System Science are quite related with medium-large-superlarge scale issues,which span spheres and projection zones.It has provided new demands for Global Spatial Grid(GSG),Global Geo-information System(GGIS) and Digital Earth.Based on analysis to current situations of GSG,this paper argues that it is necessary to develop an universal GSG,named as Earth System Spatial Grid(ESSG),which takes the multiple spheres of the planet Earth as a whole,to support the various researches on global change and Earth System Science.Referring to the application demands on GSG from multiple domains,eight basic requirements on ESSG are proposed in this paper.A SDOG-based ESSG is designed and implemented,which is in accordance to all the basic requirements.Seven potential application modes of SDOG-ESSG are introduced,which include Earth system data integration,Earth system object 3D modeling,Earth system object changes representation,Earth system spatial data indexing and cloud service,Earth system process simulating,and spatial environment planning and visualized decision-making.