California Department of Resources Recycling and Recovery (CalRecycle) 

Closed, Illegal and Abandoned (CIA) Disposal Sites

Document Survey Controls, Benchmarks, and Latitude/Longitude Data

Document Survey Controls

Document survey controls are used to locate and grid a field site when the area of interest contains no notable landmarks or reference points.


Benchmarks are marking on a permanent object indicating elevation and serving as a reference in topographical surveys.

Latitude and Longitude Data

Latitude: Angular distance north or south from the Earth's equator measured in degrees. 

Longitude: Angular distance measured east or west of the prime meridian expressed in degrees or in time.

Last updated: January 10, 2000
Closed, Illegal, and Abandoned (CIA) Disposal Sites,
Glenn Young: (916) 341-6696