在一个空间数据库中,空间数据总是以最细节的信息进行储存,以满足不同应用的需求.制图学中的制图综合就是为不同的应用生成恰当的细节层面.随着空间数据库应用的日益广泛,以及越来越多的基于Internet的空间应用的出现,对空间数据的有效自动综合成为一个紧要问题.深入探讨了当前这一领域存在的问题,提出一种面向数据库的概化处理技术,利用空间索引机制z-value进行扩展,并将其应用到空间数据的自动综合技术中,通过对空间数据库的设计和对空间操作的处理来实现一个有效的空间数据库自动综合系统.

Spatial data are often stored in a database with the finest level of details. The problem of cartographic generalization of spatial data concerns deriving spatial data with proper level of details when the data are used for an application. With more and more computerized applications making use of shared spatial data sources, and the increasing number of applications emerging from Internet-based spatial applications, efficient spatial data generalization becomes a critical issue. In this paper, the issues in efficient spatial data generalization are investigated,with a unique focus on spatial database design and spatial operations processing.Several types of a commonly used spatial indexing mechanism called z-values are proposed to achieve the goals.

国家高技术研究发展计划资助项目（2001AA113050）