多维动态地理空间框架数据的构建

地理基础框架数据是数字化地理空间基础框架的重要组成部分。迄今为止 ,人们一直是按照平面图或铺盖数据模型 ,将具有鲜明的多维、动态特征的现实空间世界抽象为二维、静态目标 ,生产、提供和使用二维 (或 2 .5维 )的地理基础框架数据。该地理基础框架数据在表达或反映三维实体及其时空变化方面有着很大的局限性 ,不能满足国家信息化的应用需求。本文就数字化地理空间基础框架的狭义和广义概念、国内外地理空间框架数据的发展过程、地理空间框架数据的三维、多尺度、时态和动态问题进行了初步的分析 ,并提出了构建多维、动态地理空间框架数据的建议 ,加强对多维动态空间数据模型的理论研究 ,开展多维动态地理空间框架数据的建设工程 ,开拓多维动态地理空间框架数据的应用领域。

Developing Dynamic and Multi-dimensional Geo-Spatial Data Framework

At the early development stage of GISs, the planar graph model has been used for spatial data modeling. The multi dimensional and dynamic spatial entities were mapped into two dimensional points, lines and polygon objects with associated attributes. This resulted 2 or 2.5 dimensional geo spatial data framework, which has been widely used in various fields and has been found many limitations. There is now a demand from many applications to develop a new generation of geo spatial data framework for three dimensional and dynamic environment. This leads to the evolution of multi dimensional and dynamic geo spatial data framework. After a discussion of the concepts and history of geo spatial data framework, this paper tries to define the context of multi dimensional and dynamic geo spatial data framework, and identify a list of challenging issues for futureresearch.