城市排水管网GIS数据异常的检测与修复

Detection and Recovery of Abnormal GIS Data in Urban Drainage Pipelines Network System

数据是城市排水管网地理信息系统(GIS)的核心和基础。只有保证高质量的数据,才能使GIS系统真正发挥在排水管网信息化管理、建模分析等方面的作用。文章按照“拓扑检测-文本属性项归类-管径检测-高程检测”的处理步骤提出了排水管网数据异常检测与修复的方法,并将方法应用到ZH市的排水管网GIS数据中,结果表明该方法能有效识别拓扑、文本属性、管径和高程数据的异常,并为部分异常数据提供合理的修正参考值。

Data is the core and base of an urban drainage pipelines network geographic information system(GIS)system.Only data of high quality can guarantee effectiveness of GIS when being used for information-based management,modeling and analysis of drainage pipelines network.A set of strategies for detection and recovery of abnormal GIS data in urban drainage pipelines network system was provided,following the steps of"topology detection,text attributes classification,pipe diameters detection and elevations detection".The above method was applied in drainage pipelines network in ZH City.The research indicated that this method could well identify errors of topology,text attributes,pipe diameters and elevations,and provideed reasonable reference values for some of abnormal data.