Drainage - Manholes

Point feature showing drainage manhole structures along the City's drainage network that allow access to chambers and pipes for maintenance and inspection. Drainage manholes are classified as Manhole, Drop Manhole, Drain Well, Settling Manhole, Cleanouts, Lawn Basin Junction, Catch Basin Junction, Catch Basin Manhole. Updated as an ongoing process.本点要素（point feature）涵盖本市排水管网沿线的各类排水检查井（drainage manhole）结构，此类设施可用于人员进入检查井室与管道开展维护与巡检工作。排水检查井可细分为普通检查井（Manhole）、跌落检查井（Drop Manhole）、排水井（Drain Well）、沉沙井（Settling Manhole）、清通井（Cleanouts）、草坪集水井连接井（Lawn Basin Junction）、截污井连接井（Catch Basin Junction）以及截污检查井（Catch Basin Manhole）。本数据集将持续开展更新维护工作。