Best Speed Camera Database

Discussion in 'ICE, Sat Navs & Dash Cams Forum' started by Adam Min, Mar 27, 2006.

  1. Adam Min

    Adam Min
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    Hi, just got a Tom Tom One and wondered whether it is better to subscribe to the Tom Tom Speed Camera database (€69 - approx £49) or the Pocket GPS world database at £19. Price isn't an issue - which is the better database ?

    Anybody any views ?

    Thanks
     
  2. IanS

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    The better one is said to be PGPS - more accurate, and more updates tend to be made.
     
  3. bibamus

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    I think the price would do it for me too! But PGPS is probably the best one out there.
    Allan
     
  4. Inotrope

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    The PGPS is very good, and offers a variety of different icons and even voice warning of impending cameras.

    I suspect that the fact that it is updated my a myriad of users accross the UK might mean that the data is more accurate than the TT one (which will have fewer scouts!).

    As an ex-snooper user (tired slow technology IMHO!); the PGPS & TT1 solution is far better, and for £19/year a bargain.
     
  5. Figment

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    Better still drive within the speed limit and make the roads safer for all of us. No software required. :smashin:
     
  6. TJNewton

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    Hi Adam,

    I've just bought a TT1 and was considering subscribing to the speed camera database. I presume from what you say that you know the P GPS is compatable with the TT1. If so sounds like a more affordable option.
     
  7. Adam Min

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    Yes I downloaded the PGPS database and it works fine - you need only subscribe for a month - £2 - bargain.
     
  8. Kahled

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    But not as simple as that all the time.

    In just over 18 years of driving I have had one speeding ticket *touch wood* and that was coming out of Manchester, didn't know the roads and so just sat behind two cars matching their speed. Next thing a policeman walks out and flags all three of us to the side and does the lot of us, we'd got caught in a standing trap further up the road.

    From one POV speed camera/trap databases are a license to speed where you think safe from capture but from another they are indeed safety solutions and having this capability on the Sat Nav can be beneficial where signposting is not so obvious.

    Anyway, thanks for the info peeps... will be signing up to the PGPS database this week :thumbsup:
     
  9. Uridium

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    Actually these Databases are "Safety Camera" databases, they are designed to give you warning of camera's located at accident blackspots, therefore using them supposedly makes you a safer driver.:smashin:
     
  10. Ballistic

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    Can anyone using the PGPS database with the TT1 confirm if the TT1 warns you of the speed limit when approaching a camera.
     
  11. Nick_UK

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    So what's wrong with a device which helps you keep to the speed limits ?
     
  12. Chris Muriel

    Chris Muriel
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    Nothing wrong with that.
    However, let me throw a possible spanner into the works....

    The only worry I would have is that surely the speed estimate it gives will be invalid when going up or down a steep hill or incline ; I would expect it to underestimate your speed in this case. Beware especially long downhill stretches with a "safety camera" near the bottom (like one I recall driving north on the A38 towards the beginning of the southernmost stretch of the M5 south of Exeter).

    This assumes that I am correct in thinking that the GPS device will underestimate your actual travelled distance in such cases.

    Can anybody definitively confirm or deny my theory ?

    Chris Muriel, Manchester
     
  13. Nick_UK

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    Good thought ! I thought that maybe the sat nav could take the altitude into account and do some calculation, but having seen what a pig's ear most sat nav systems make of altitude calculations, I doubt it would work if it were to be used.
     
  14. RBZ5416

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    You misunderstand how these databases work. The camera's locations are simply recorded within the SatNav maps & the software warns you as you approach. The more sophisticated PGPS version also records the speed limit at that location so can issue a spoken warning that you are approaching a camera & what the speed limit is. You receive the warning regardless of your speed.

    Your actual speed as calculated by the GPS has no bearing whatsoever.
     
  15. Chris Muriel

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    Not true in all cases.
    On my Garmin i3 I receive one of 2 different tones :
    1) A tone signifying that I am approaching a known camera site or...

    2) A different multiple-tone signifying that the i3 considers that I am travelling above the speed limit in the vicinity of the aforementioned camera ; it reverts to the simple tone if I then drop my speed.

    I am casting aspersions on the accuracy of 2).

    Chris Muriel, Manchester
     
  16. bibamus

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    If all else fails, you could always check your speedo............ But, having said that, the GPS will be more accurate than your speedo, uphill or down, unless you go through a long tunnel...

    Allan
     
  17. bibamus

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    Altitude calculations are based on atmospheric pressure, which, as we all know changes all the time. The only accurate way to use a gps with an altitude read out is to either set the thing with a known pressure or accurate altitude before you start your journey ( or climb or descent) The longer you go without recalibrating it, the less accurate it will be over time. If you have a unit that wont enable you to calibrate the pressure, it will be useless.

    Allan
     
  18. IanS

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    I thought that altitude could be calculated as long as there was a fix on at least three satellites.
     
  19. justy101

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    Me too. GPS is based on the time differential from all the satellites? So surely if your at a higher altitude then the time for the signal to get to the receiver is less ????:confused:
     
  20. lynx

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  21. mooro1973

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    Quite correct.

    I've used a Garmin for years as a private pilot, and have never seen a pressure valve.

    The unit warns me when I am about to enter controlled air space. Since airspace is allocated both vertically and laterally, a G.P.S. for aviation use would be pretty useless if it couldn't calculate altitude.

    But thanks to Mr. Pythagorus et al, they can do so with no bother.
     

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