Rancho Palos Verdes City Council
   

October 7, 2006 RANCHO RANCHO PALOS VERDES CITY COUNCIL AGENDA - Landslide Workshop- GPS MONITORING SYSTEM October 7, 2006 RANCHO RANCHO PALOS VERDES CITY COUNCIL AGENDA - Landslide Workshop-GPS MONITORING SYSTEM October 7, 2006 RANCHO RANCHO PALOS VERDES CITY COUNCIL AGENDA - Landslide Workshop-GPS MONITORING SYSTEM

GPS MONITORING SYSTEM

Since the early 1990’s the City has been monitoring the movement of the Portuguese Bend landslide complex utilizing global positioning technology. The Global Positioning System (GPS) is a satellite-based navigation system made up of a network of 24 satellites placed into orbit by the U.S. Department of Defense. GPS was originally intended for military applications, but in the 1980s, the government made the system available for civilian use. The attached map shows the approximate location of the GPS points that have been monitored over the years. Currently, the RDA is taking readings twice annually at a cost of about $60,000. Readings were taken in April and September of 2006.

At a recent Council meeting the city geologist discussed the accuracy of these readings. We have generally accepted an accuracy of 1/8 to 1/4 of an inch.

Walter Brown of Charles Abbott Associates will present the GPS data in a PowerPoint presentation designed for understanding by the non-geologist. 144 pages of raw data are available from the Public Works Department for those who wish to do their own analysis.