Measure type: Surveillance
Contents
Measure: surveillance
Surveillance is the monitoring of the behavior, activities, or other changing information, usually of people for the purpose of influencing, managing, directing, or protecting.[1]
Monitoring of traffic is a related activity which can be used for general traffic management or incident management.
Description
Surveillance is the first step in the reaction chain detection-perception-interpretation-formulating action-acting. The essence of surveillance lies in the detection of the actual situation. This can be done in various ways:
- by dedicated observers on location
- remotely by dedicated observers
- by the public
By dedicated observers on location
Observation of the situation by dedicated observers on location can be done either by observers that are incognito, or observers that are clearly distiguishable. Both strategies have their advantages:
- observation by observers that are incognito can reveal the situation in its natural behaviour, undisturbed by the fact that it is observed. This can reveal behaviour (and its causes) that otherwise remain ondetected.
- observation by observers that are clearly distinguishabe can convey the presence of authority and excert a mitigating effect on the behaviour of the observed.
Remotely by dedicated observers
Monitoring with the help of cameras (CCTV) has become a common method throughout all Europe to combat crime and terrorism. In the UK more than 4 million cameras have been installed (The Associated Press, 2007).
By the public
This concerns involving (a select part of) the public in the detection of crime. This can both be facilitated by electronic means and more traditional means. Examples of both approaches can be found in:
- The USA 'Eagle Eyes' initiative of the Air Force office of Special Investigation[2]
- 'Veilige wijk' The Hague[3]
- Amber alert[4]
- Gulfort Alternative Policing strategy[5]
Essential conditions
- For surveillance to be effective, an observer needs to be able to oversee an area.
- In order for surveillance to have the intended effects, it is essential that the reaction chain is unbroken. As often the links in the reaction chain are managed by different people or organisations, the communication in this chain is of vital essence.
Requirements to the urban environment
The extent to which an area can be overseen by an observer is highly dependent on
- the available positions for the observer
- the field of vision, which is directly related to the geometry of the space
- the lighting conditions
Effectiveness
The effectiveness of surveillance against crime lies in two effects:
- its contribution to the reaction chain
- the mitigating effect of clearly visible observants
- the contribution it can have to the prosecution of crime (gathering evidence and leads)
As such, it can be effective to all modi operandi that can be mitigated by a reaction force or by the presence of authority. These are:
- break and enter
- ram-raiding
- kidnap
- pickpocket
- rob with assault
- snatch theft
- car theft
- physical assault including sexual
- destruction of property
- arsony
- grafitti
- verbal abuse, bullying
Effectiveness of surveillance by dedicated observers on location
Effectiveness of remote surveillance
Effectiveness of CCTV:
- Empirical research finds that the overall crime rates drop in the areas with CCTV, but not in all cases and situations. Furthermore, crimes committed in the heat of the momen, such as assaults are in general not affected by the presence of cameras.
- Total costs of CCTV far exceed that of the camera hardware alone[6].
- To be effective, surveillance systems should be fully integrated into law enforcement practices
Effectiveness of surveillance by the public
Side effects
Side effects of surveillance can be:
- increased perception of unsafety by the public (some research suggests observation of increased public security measures such as video surveillance of pulbic places reduces citizens social fear of crime but increases their personal fear of crime (e.g. breaking and entering of their homes)[7]
- increased perception of safety by the public
- decreased perception of privacy by the public
- overconfidence
- reflective fear
Side effects of remote surveillance
- CCTV and the displacement effect
Situational crime prevention measures such as camera surveillance are subject of displacement effects. A UK-study (2009)[8] empirically tested this thesis in the UK on 13 CCTV projects and concludes that spatial displacement of crime due to camera surveillance does occur, but not in a frequent and uniform way across space and types of offences[9]
Footnotes and references
- ↑ wikipedia:Surveillance
- ↑ http://www.osi.andrews.af.mil/eagleeyes/index.asp
- ↑ link to be added
- ↑ wikipedia: AMBER Alert
- ↑ http://www.ci.gulfport.ms.us/police/gaps.html
- ↑ See e.g.:http://www.library.ca.gov/crb/08/08-007.pdf and http://www.guardian.co.uk/commentisfree/libertycentral/2009/dec/22/cctv-surveillance-police-cost
- ↑ CPSI project, http://www.cpsi-fp7.eu.
- ↑ Waples, S., M. Gill, and P. Fisher (2009). Does CCTV displace crime? Sage Publications.
- ↑ Violence against persons, for example, increased dramatically, which (according to the authors) "could be explained by the increase in reporting due to the cameras or due to the national upward trend in recorded violent crime."
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