GIS符号库通用数据模型及其数据交换格式的研究

摘要

Symbol portrayal is an important function of GIS.Sharing symbolic information in different GIS platforms is neces-sary for GIS applications and users.This paper discusses the necessity,possibility and solution technique of sharing a symbol library in different GIS platforms.The route map is designed as follows:first,to set up a general data model for the symbol li-brary,then to design a standard exchange format,and finally to call on the GIS manufacturer to provide the interchange tools for their symbol library for the standard exchange format.This paper analyzes the general characteristics of GIS symbolic li-brary,gives a symbol library model and a draft of XML schema of the symbol library exchange format.