I spend some time create the map for sewerage level, there are two languages: chinese and english.
Notice that this map is not 100% accurate, I measure the size through player walking, it will be very close to the original size.
通过游戏内人物走动方式进行测量，地图并不是100%准确。
Here is the link:
中文版地图 [drive.google.com]
English Map [drive.google.com]