Signalling card sewerage (traces) 2017

The Signalering Map (traces) signals the location and age of sewerage. Based on the year of construction, the sewers are divided into 4 age classes. Open data from the municipality of Rotterdam has been used via Rotterdamopendata.nl信号追踪测绘图（Signalering Map (traces)）可用于标识污水管网的位置与服役年限。本数据集依据管道建造年份，将所有污水管道划分为4个服役年限等级，数据通过Rotterdamopendata.nl平台取自鹿特丹市政当局发布的开放数据。