城市地下管网地理信息系统的数据结构  

DATA STRUCTURE OF URBAN UNDERGROUND PIPELINE GEOGRAPHICAL INFORMATION SYSTEM

作　　者：鲁保玉[1] 李国贞[1] 

机构地区：[1]漯河职业技术学院计算机工程系,河南漯河462002

出　　处：《计算机应用与软件》2008年第3期271-272,共2页Computer Applications and Software

摘　　要：基于G IS的城市地下管网系统是一种三维空间信息系统,必须选用三维G IS平台。由于不同的管线互不交叉,因此可以对其进行分层分类管理。地下管网的数据分为结点和管段两种类型。对于变深结点的表示可以通过增加变深字段来实现。管线上任意点的高程数据可以通过线与结点之间的拓扑关系取得该结点的三维空间信息后利用线性关系计算的办法获得。Urban underground pipeline network based on GIS is a 3-dimension space information system, which must be demonstrated on 3-dimension GIS platform. Because different pipelines do not intersect with each other,they can be managed through being partitioned into different categories and layers. The data of underground pipeline network belong to either of the two types ： node and pipe. Demonstration of variable-depth nodes can be implemented through adding variable-depth fields. The altitude data of points on pipelines can be acquired by linear calculation with the 3-dimension space information obtained through the topological relationship between lines and the node.

关 键 词：地下管网 GIS 数据结构 

分 类 号：P208[天文地球—地图制图学与地理信息工程] TU990.3[天文地球—测绘科学与技术]