Bridges

The dataset includes the location of urban bridges including attributes such as year of construction, construction etc. Data for maintenance work is also kept (internal only).本数据集涵盖城市桥梁的位置信息，同时包含建造年份、施工情况等多项属性数据；此外还留存有养护作业相关数据，该类数据仅可内部使用。