What to use to measure sewer pipes in a city?

To measure sewer pipes in a city, professionals typically use a combination of tools, including laser distance meters, sonar equipment, and camera-equipped inspection robots. These devices help determine the diameter, depth, and alignment of the pipes. Additionally, GPS technology can be employed for accurate mapping and location tracking of sewer infrastructure. For more detailed assessments, flow meters may also be used to measure the volume and speed of wastewater flow.