Surveillance Electronic -- See Electronic surveillance Here are entered general works on the monitoring of events from remote or secret locations by electronic means in the fields of law enforcement, criminal investigation, espionage, remote sensing for scientific purposes, etc.
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Surveillance Public Health -- See Public health surveillance Here are entered works on the systematic collection and evaluation of data on the incidence and distribution of diseases and injuries for the purpose of their prevention.
Surveys Plotting -- See Also Map drawing Here are entered works on the mapping of small areas and the drawing of maps in elementary schools. Works on the general science of mapmaking, including map projection and the mapping of large areas, are entered under the heading Cartography.
