GIS空间数据库的"一库两用"策略研究

GIS有两种普遍的应用需求:空间分析和数字制图,但两种需求对空间数据的要求不完全一致,导致空间数据在同一GIS中无法充分共享。该文探讨能够同时满足两种需求的GIS构建方法。分析地理空间数据存在的冲突,引入"一库两用"思想,建立空间分析型数据模型;利用专家系统机制实现空间分析数据向数字制图数据的转换,转换过程中补充的信息源于专家知识库。该研究有助于解决GIS中数据不一致问题,使GIS更实用、功能更完善。

Study OR the Method for Amphibious Database of Spatial Database of GIS

Geographic Information System(GIS) are needed in two aspects of applications:geographic spatial analysis and geographic expression.These two aspects,however,demand for different spacial data.It leads to the data being not fully shared in one GIS system.This article purposes to discuss an integrative method of building a GIS database which can meet the expectations of both applications.On the basis of analysis the data conflict,the thought of Amphibious Database is defined that the spatial analysis data,which is utilized to convert to the geographic expression data,is stored in one GIS database.This transforming is described as a process of adding geographic information,which is supported by the main technology:the expert system that controls the condition of conflict,conclusion and action of converting.In addition,the repository in the expert system offers a great deal of rules of geographic expression deriving from experienced theory of cartography for conflict-condition.Consequently,the method ensures that GIS can get rid of the trouble coming from the data difference,and be transformed into a more practical,comprehensive system.