From: nonanon on
On Tue, 23 Mar 2010 10:58:41 +0000, Ret. wrote:

> nonanon wrote:
>> On Mon, 22 Mar 2010 21:50:31 +0000, Ret. wrote:
>>
>>> From the current issue of the Cheshire Police monthly newspaper in an
>>> article describing the creation of the NWMPG (North West Motorway
>>> Police Group) which is a joint venture between Cheshire Police,
>>> Merseyside Police, Lancashire Police and, shortly, Greater Manchester
>>> Police:
>>>
>>> Using Number Plate Technology;
>>
>> Uh, you do know this has been happening for many years? Thus the law
>> change to require certain fonts on licence plates?
>>
>> Heathrow and City of London have been doing this for yonks.
>
> Yes of course - but static sites are a comparatively recent
> introduction.

All the sites in CoL and Heathrow are static. They've been recording
millions of licence plates for years and years.
From: Ret. on
Phil Stovell wrote:
> On Tue, 23 Mar 2010 11:01:47 +0000, Ret. wrote:
>
>> As I have mentioned in another post - the vast number of 'reads' per
>> day means that it would be impossible to record the movements of
>> 'all' vehicles - and why would they want to waste time and resources
>> in doing so? The only vehicles that are tracked are those recorded
>> as 'hits' - ie, those vehicles that are 'tagged' as being of police
>> interest.
>
> I could quite easily write a program that traced, as far as possible,
> every car number that appeared on every camera. Get me the data, and
> I'll do it! Sort all the data sets into ascending registration number
> and date/time of photographing and location - I expect you can see
> what I mean.

Even if you could do such a thing - it would be pointless without a 'person'
looking at it for some reason. The system I have described is on North West
motorways only - and yet there is a projected 'read' of 560,000 vehicles
*per day*.

What value could be gleaned from such a mass of useless information?

Kev

From: Adrian on
fred <not(a)for.mail> gurgled happily, sounding much like they were saying:

> [1] Just think how many posts google groups archives a day.

I'm not so sure that's a great example these days...
From: Phil Stovell on
On Tue, 23 Mar 2010 12:13:32 +0000, Ret. wrote:

> I accept that the computer technology is there to record all these reads
> (although, even in just the North West, with 560k 'reads' a day - the
> database would very soon become ludicrously overwhelmed with useless
> information). But the fear that someone will be 'watching' where you are
> going is baseless.

If it can be done, it will be done. 560k per day is trivial.

> Kev

From: Phil Stovell on
On Tue, 23 Mar 2010 12:09:25 +0000, Ret. wrote:

> Phil Stovell wrote:
>> On Tue, 23 Mar 2010 11:01:47 +0000, Ret. wrote:
>>
>>> As I have mentioned in another post - the vast number of 'reads' per
>>> day means that it would be impossible to record the movements of 'all'
>>> vehicles - and why would they want to waste time and resources in doing
>>> so? The only vehicles that are tracked are those recorded as 'hits' -
>>> ie, those vehicles that are 'tagged' as being of police interest.
>>
>> I could quite easily write a program that traced, as far as possible,
>> every car number that appeared on every camera. Get me the data, and
>> I'll do it! Sort all the data sets into ascending registration number
>> and date/time of photographing and location - I expect you can see what
>> I mean.
>
> Even if you could do such a thing - it would be pointless without a
> 'person' looking at it for some reason. The system I have described is on
> North West motorways only - and yet there is a projected 'read' of 560,000
> vehicles *per day*.

Data volume:

RegNo 8 bytes
location 8 bytes (at most)
date/time 8 bytes (in microseconds)

24 * 560,000 = 13MB. Next to nothing. A CD (700MB) would hold nearly 2
months worth of data to be left on a train. An 8GB memory stick would hold
around 2 years worth.

> What value could be gleaned from such a mass of useless information?

I don't know. Ask Mike Corley. What value in storing all the emails and
websites visited?

> Kev