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Glossary


A traffic enforcement camera (TEC) is a system, including a camera and a vehicle-monitoring device, used to detect and identify vehicles disobeying a speed limit or some other road legal requirement.

Speed cameras (SC) are used for identifying vehicles traveling over the legal speed limit.
  • such devices use radar to measure a vehicle's instantaneous speed.
  • Sets of multiple cameras with number-plate recognition software which can check the average speed of a vehicle between two points.
Red light cameras are used to detect vehicles which cross a stop-line or designated stopping place after a red traffic light shows.

The speed camera types reconized by iSpeedCam are:
 
Unknown Camera
   Unspecified camera type.
 
Blue Speedcam
   Fixed camera type, like Gatso, Truvelo, Monitron and others.
 
Blue Redlight
   Traffic lights where a Traffic Enforcement Camera is present.
 
Mobile Blue
   Locations where Safety Partnership camera vans and police regularly check your speed.
 
Section Blue
   Section cameras measure your average speed over a section of the road, by registering your entry / exit time.
 

If you do not wish to get warnings for some of the camera types, you can disable them on the Camera filters screen.

When you think that you have a false alarm for a certain camera, you can tap the toolbar button on the main screen to filter out that camera, and you won't get any warnings for that camera. However, you reactivate that camera by removing the delete filter of that camera.

The speed limit signs for the cameras are:
 
Red Sign
   Speed limit sign when using metric units.
 
Imperial Speed Limit
   Speed limit sign when using imperial units.
 

Bus lane cameras are used for identifying vehicles traveling in lanes reserved for buses. In some jurisdictions bus lanes can also be used by taxis and/or vehicles engaged in car pooling.

Toll-booth cameras are used for identifying vehicles proceeding through a toll booth without paying the toll.

Level crossing cameras are used for identifying vehicles crossing railways at grade illegally.

Congestion charge are used cameras for recording vehicles inside the chargeable area.

Double solid line cameras are used for identifying vehicles crossing these lines.

High-occupancy vehicle lane cameras are used for identifying vehicles violating the occupancy requirements.

Turn cameras are used at intersections where specific turns are prohibited on red. This type of camera is mostly used in cities or heavy populated areas.

Parking cameras are used which issue citations to vehicles which are illegally parked or which were not moved from a street at posted times.

Camera maps are files with different format that describe the geographical coordinates of the speed cameras or other TECs.

Camera's Warning area is the area, in which the application actively warns for the camera presence, demanding to obey the speed limit.

Camera's Proximity area is the area, in which the application informs the user that a camera is approaching.

Peace area is any place outside of the cameras proximity and warning range.

Filtered out camera is a database element (camera) which the user considers false, and asks to not warn for.

As the iSpeedCam application is mainly used by drivers, we use the term of Vehicle (vehicle position, movement, speed, etc.) to indicate the position, movement speed that the iPhone's GPS navigation system measures. And yes, we know that you are not a vehicle if you get out to the street with the phoneand run a few squares.

We call Track the route segment traversed by the vehicle during an application run.However, if the vehiclestops for a given period (e.g. 2 hours), a new track begins. We consider a vehicle stopped for a given period if its position changes less than a given distance (e.g. 200m) in that period.

A point of interest, or POI, is a specific point location that someone may find useful or interesting.

The term is widely used in cartography, especially in electronic variants including GIS, and GPS navigation software. A GPS point of interest consists at the very minimum of the latitude and longitude of the POI, although a name or description for the POI is usually included too. Camera databases are in fact POI files.

There are several formats for writing degrees, all of them appearing in the same Lat, Long order.
  • DMS Degrees:Minutes:Seconds (4930'00"N, 12330'00"W)
  • DM Degrees:Decimal Minutes (4930.0', -12330.0'), (49d30.0m,-123d30.0')
  • DD Decimal Degrees (49.5000,-123.5000), generally with 4-6 decimal numbers.
DMS is the most common format, and is standard on all charts and maps, as well as Global Positioning Systems (GPS) and geographic information systems (GIS). DD is the most convenient if a need for calculation or computation might arise, avoiding the complexity and likely introduction of errors by mixed radix degree minute second arithmetic.

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