Abstract: In order to resolve the data sharing caused by different code for the same geospatial object and the geospatial object code having no level information, a global geospatial information unique geocode model, GeoDNA, was put forward based on the global subdivision grid and the models architecture to express global continuous and multi-level geospatial information. At last, an example of encoding remote sensing image data was given. The results show that GeoDNA on global geospatial information enhances the information sharing capacity in GIS and improves the global massive data storage and management more effectively, which is of theoretical and applied value in regional emergency response.

Key words: global subdivision grid(GSG), GeoDNA, time-space record structure, space-time record structure

摘要： 为了解决因同一空间对象编码不同所引起的数据共享困难以及空间对象的编码无层次性问题，在全球剖分格网框架上提出了全球空间信息惟一性地理编码(GeoDNA)模型，并设计了该编码模型的系统架构，试图实现全球连续的、多层次空间信息的全息表达。通过对遥感影像数据进行编码探索，表明全球空间信息剖分编码GeoDNA模型将大大增强空间信息的共享能力，加快信息的查询与检索速度，提高全球海量数据的存储与管理的效率，在区域性的应急反应方面具有很强的理论和实用价值。

关键词: 全球剖分格网, GeoDNA, 时空记录框架, 空时记录框架