地理信息系统图例库的研究

图例库是地理信息系统（ＧＩＳ）的有机组成部分,开发灵活实用的图例库是研制ＧＩＳ软件的重要内容之一,关系到ＧＩＳ成果图形表达的科学性。借鉴ＩＮＴＥＲＧＲＡＰＨ／ＩＧＤＳ的图例库设计思想,引入“符合集合”及“操作函数”的概念,从图例库的基本内涵、实体内容及主要操作等几方面论述了作者对图例库的研究成果。

A STUDY ON SYMBOL LIBRARY OF GEOGRAPHIC INFORMATION SYSTEM

Symbol library is one organic component of Geographic Information System(GIS). Development of flexible and applicable symbol library is one important task to programming GIS software. The accuracy of output map of GIS is related to the symbol library. How to develop scientific symbol library is the domain of this artical. The basic concept and hierarchical structure and main function of symbol library are discussed at first. Then the classification system of map symbols is set up according to characteristic of symbols and handling manner of symbol library. While the "Symbol Set" term is used to discusse the creation of symbol library contents, many kinds of operations of symbol library are studied by use of "Operation Function". Finally, the authors take the National Symbol Library of Coal Field Geology and Symbol Library of Coal Mine Geoglogy and Survey as examples to introduce the development and application of symbol library.