The chapter four is involved in designing of gis prototype system . with the method of object - oriented and united modeling language , gis prototype system is analyzed through using - case view , classes view and sequence view 第四章有關(guān)gis原型系統(tǒng)的設(shè)計。采用面向?qū)ο蠹夹g(shù),用uml對gis原型系統(tǒng)進行系統(tǒng)分析。通過用例圖、類圖和序列圖從不同側(cè)面描述系統(tǒng),并介紹了系統(tǒng)中的功能模塊。