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  1. #1
    Join Date
    Jan 2005

    Question How does a GPS tell a car's speed?

    How does a GPS tell a car's speed? I have seen some in-car GPS units that can tell a car's speed. How is this? Is the GPS hooked up to the speedometer?

    And if you buy a portable handheld GPS, can it tell your car's speed?

  2. #2
    Network Engineer SolMiester's Avatar
    Join Date
    Feb 2005

    Default Re: How does a GPS tell a car's speed?

    No, measurement between two set points divided by the time taken to reach point B from A
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  3. #3
    Madre Dios!!! beeswax34's Avatar
    Join Date
    Aug 2006
    Central Auckland

    Default Re: How does a GPS tell a car's speed?

    No, it measures the distance that you've traveled and then divides it by the time it took you to give you your speed ie:

    Distance/Time = Speed
    All the technology and software in the universe is useless when the end user has the IQ of a sack of hammers.

  4. #4
    Join Date
    Oct 2007
    shallow north

    Default Re: How does a GPS tell a car's speed?

    You bet it can tell the speed of the vehicle its just time and distance.
    One of my customers fired a truck driver because they clocked him at 120 kph southbound down Bombay hills. Think of it as a high tech stopwatch over a known distance.
    If you are going to commit a crime in you car remember to turn your gps off.

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