Track: State/Local Government, Cadastral, Land Records
"Dirty" Movies Have a Bright Future in GIS
Gary DeakinThe Drainage Division's GIS Section in Qatar has been acquiring extensive information on its foul and surface water/sewer networks for which it implements the novel technique of closed circuit television (CCTV). It has two types of CCTV systems, the first type being a manually pushed camera for use in sewers up to 250 mm in diameter and the second type being a remote controlled tractor mounted camera to survey pipes up to 2,000 mm in diameter. Both these systems are built on a CCTV survey vehicle. The camera is lowered into the start manhole and manually pushed or mechanically driven through the pipe until the end manhole. During this movement of the camera inside the pipe, data pertaining to the length of the pipe are measured by the in-built device and various defects, including fractures, holes, water ingress, roots, and debris, and connections are recorded on a videotape and coded by the operator. The data can be instantly viewed on a monitor and problem areas can be reported to the Operation and Maintenance Section for immediate action. The digitally stored data can also be accessed by a GIS application to justify budgets and accurately target areas for replacement, lining or simply to carry out local repairs to the sewers, which is an asset to the Drainage Division.
Gary Deakin
The Centre for GIS
PO Box 22088
Doha,
QATAR
Telephone:
Fax: