The function design of system includes writing down amendment and pretreatment about spatial database and attribute database . this system provides common and basic functions of gis . besides , we can make out the topographical maps , planimetric maps and skiagraph , structure objects of highway construction of design and can inquire two - way between spatial information and attribute information 系统功能设计包括空间数据库和属性数据库的录入、修改以及预处理；系统还提供了一般gis系统应具备的基本功能，并在此基础上进行涵盖公路设计施工的地形图、平纵缩图、构造物等图形信息与属性信息的双向查询，并运用挣值法等对相关属性进行分类统计以供有关公路工程项目的各方使用。
