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Need Help to Identify Mobile Speed Camera position URGENT
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Darren
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PostPosted: Wed Dec 08, 2010 2:15 pm    Post subject: Reply with quote

Given the conviction for the Twitter comment a few months back, I think we can be clear that courts don't do humour.
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dales
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PostPosted: Wed Dec 08, 2010 4:36 pm    Post subject: Reply with quote

MaFt wrote:

I've not got a nuvi with tracklogging functionality so it's not something I can check. i.e. does it ALWAYS use 'zulu time' or does it change according to your timezone / DST etc?
MaFt


The GPX file in my nuvi 255, has a Z in the timestamp at all times, regardless of season.

(...and when opened up in MemoryMap, the summer journeys read in British Summer Time. Clever, eh!)

Dales.
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NickG
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PostPosted: Wed Dec 08, 2010 6:14 pm    Post subject: Reply with quote

mikealder wrote:
A GPS log will only contain UTC time and that doesn't alter for the stupid daylight saving system we employ in this country, unless the GPS log contained a checksum against each line (as you get with NMEA data) then I don't see this as someone meddling with data unless they actually admitted it.


Mike - it's precisely *because* GPS only records UTC that he'd have had to correct the time by one hour in the log in order to match up with the camera's time. He didn't slew the times back by 1 hour, so the GPS logs would have been for when he drove the second time during BST. That would have failed to line up with the speed camera time which was probably logging in GMT prompting suspicion. Very well spotted by whichever police officer or investigator spotted it. Ie, he was submitting logs as evidence that he drove past the camera at 11am when the speed camera clocked him going past at 10am (or vice versa) - it's that discrepancy which would have alerted them to the problem.

I have a feeling that speed cameras contain a GPS for timing too, so any discrepancy would have been reasonably easy to spot and could not have been attributed to someone setting a clock incorrectly somewhere as NMEA data is always UTC.
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DennisN
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PostPosted: Thu Dec 09, 2010 12:24 am    Post subject: Reply with quote

BigPerk wrote:
WHY then was he even bothering to argue his (false) case here anyway??

Because at some stage he has (or intended to) shown this thread to solicitors, courts etc to demonstrate that his case is of interest to the biggest GPS website in the world, so he's bound to be innocent. (Not my logic).

If I was the boss of this site I'd be very tempted to ban him on the grounds of him attempting to pervert us!
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K13ehr
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PostPosted: Thu Dec 09, 2010 8:03 am    Post subject: Reply with quote

Do we know what the sentence was yet Question Question

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swing
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PostPosted: Thu Dec 09, 2010 11:32 am    Post subject: Reply with quote

K13ehr wrote:
Do we know what the sentence was yet

From The Telegraph:
Quote:
he was given a fine of 175, costs of 300 and a victim surcharge of 15 as well as three penalty points on his licence.

which was for the original speeding conviction (which he admitted to). As for the perverting the course of justice (which he also admitted to)
Quote:
will be sentenced next month by a judge and faces an immediate custodial term.

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tedkay
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PostPosted: Fri Dec 10, 2010 10:35 am    Post subject: Reply with quote

He should have pleaded Not Guilty to the perverting the course of justice charge - he could have provided another GPS log falsified to 'prove' that he was in Scotland at the time ! Wink
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tedkay
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PostPosted: Fri Dec 10, 2010 10:43 am    Post subject: Reply with quote

...hmmm - thinking about all this it occurs to me that maybe I could try the GPS log method to 'prove' to my wife that I was in fact working late and not doing the '5 o'clock club' in my local ! Cheers!
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Minornut
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PostPosted: Thu Dec 16, 2010 11:34 pm    Post subject: Reply with quote

There may be situations where GPS log would be admissible evidence, but I can't believe the defendant's own print-out would be one of them.

I once worked on a telematics system that (among other features) would send an SMS datagram if the airbag or roll-over sensor activated.
Part of the data included current GPS position and "string-of-pearls" position history, from which the recipient could work out which side of the road you were travelling on, or how far off it you had gone, which way up the car was and, by position/time calculation, an indication of how bad the accident was.
That's how they would know whether to send towtruck / fire brigade / ambulance / hearse. But of course, it would be simple to show what speed you were doing too.

Anyway, one of the OEM customers insisted GPS timestamps were not included in the position history, to avoid the posibility that the data could be used in evidence against the driver.
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Skippy
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PostPosted: Fri Dec 17, 2010 11:57 pm    Post subject: Reply with quote

Minornut wrote:
Anyway, one of the OEM customers insisted GPS timestamps were not included in the position history, to avoid the posibility that the data could be used in evidence against the driver.


Welcome

I don't know if it's true or not but I've heard that modern cars store the last few seconds of data, steering, speed, brakes, ESP, ABS, airbag activation etc in the event of a crash so a car manufacturer can use it in their defense if necessary.

I wonder how long before that starts getting used against motorists in court?
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Darren
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PostPosted: Sat Dec 18, 2010 10:16 am    Post subject: Reply with quote

It's true. The vehicle computers store all manner of data. Every car built since 2000 has an OBDII port and you can read all manner of data points via that.

How much is stored varies, for some it's just error codes, for others it is the last state of any monitored item which can include throttle position, speed etc.

Witness the recent case of the Prius in the US where some chancer tried to claim his cars throttle had stuck open and the brakes wouldn't stop it. Toyota got access to the on-board computer and were able to prove that neither were true. It later turned out his business was about to go under and he was trying to make some quick cash.
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spook51
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PostPosted: Thu Jan 13, 2011 8:53 pm    Post subject: Reply with quote

The final episode: http://www.bbc.co.uk/news/uk-england-devon-12182321
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pcaouolte
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PostPosted: Fri Jan 14, 2011 6:00 pm    Post subject: Reply with quote

Oh well, at least he still has a clean licence (presumably). Twisted Evil
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Andy_P
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PostPosted: Fri Jan 14, 2011 8:56 pm    Post subject: Reply with quote

Nope....

swing wrote:

From The Telegraph:
Quote:
he was given a fine of 175, costs of 300 and a victim surcharge of 15 as well as three penalty points on his licence.

which was for the original speeding conviction (which he admitted to). As for the perverting the course of justice (which he also admitted to)
Quote:
will be sentenced next month by a judge and faces an immediate custodial term.
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pcaouolte
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PostPosted: Sat Jan 15, 2011 9:59 am    Post subject: Reply with quote

Ah, missed that bit. What a shame!

Justice appears to have been done on both counts then. Very Happy
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