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M7 Occasional Visitor
Joined: Jul 02, 2008 Posts: 2
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Posted: Thu Jul 03, 2008 3:20 pm Post subject: Ding...ding...Speed Camera Database...ding...ding..ding |
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I dowloaded the camera update yesterday onto my Zumo and am not happy with it but that may be my fault for not setting it up properly.
It is a very comprehensive database showing an accurate location of all cameras.
Unfortunatly the Zumo warns me of every camera including red light cameras and cameras in the opposite carriageway neither of which I want.
I also get warned too far ahead of the camera sometines more than half a mile.
On a ride yesterday there was an alarm going off virtually all the time from Wandsworth to Esher along the A3.
It became so distracting that I ended up turning the thing off, which rather defeats the point of having it.
Is there a way of turning off red light and opposite carriageway cameras so the warnings I am getting are relevent to me? |
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PaulB2005 Pocket GPS Moderator
Joined: Jan 04, 2006 Posts: 9323 Location: Durham, UK
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Posted: Thu Jul 03, 2008 3:38 pm Post subject: |
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Hi and welcome.
If you download and use the Consolidated Database you can choose to omit certain camera files such as the Mobiles and RedLights, by simply not loading them.
Unfortunately Garmin only allow their own database to use Directional Data to distinguish between cameras on your side of the road and the other side of the road.
You can edit the alert distances with POILoader by selecting Custom mode, or you can use Ash10s Camera Manager from here which allows further customisation of the way the database alerts work. |
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Sallyann Lifetime Member
Joined: Jun 23, 2006 Posts: 768
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Posted: Thu Jul 03, 2008 10:33 pm Post subject: |
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PaulB2005 wrote: |
Unfortunately Garmin only allow their own database to use Directional Data to distinguish between cameras on your side of the road and the other side of the road.
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Just to satisfy my ignorance, what is the problem with getting an outside directional database into the Garmin? Is it simply a matter of a proprietary format? Has no-one tried to copy it?
(I use a Mio so have directional cameras as a matter of course)
Sal |
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PaulB2005 Pocket GPS Moderator
Joined: Jan 04, 2006 Posts: 9323 Location: Durham, UK
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Posted: Thu Jul 03, 2008 11:22 pm Post subject: |
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Quote: | Just to satisfy my ignorance, what is the problem with getting an outside directional database into the Garmin? Is it simply a matter of a proprietary format? |
Yes
Quote: | Has no-one tried to copy it? |
Unless Garmin tells anyone the format it will be difficult to copy. |
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M8TJT The Other Tired Old Man
Joined: Apr 04, 2006 Posts: 10118 Location: Bexhill, South Sussex, UK
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Posted: Fri Jul 04, 2008 7:12 am Post subject: |
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That sounds like a challenge Sal |
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MaFt Pocket GPS Staff
Joined: Aug 31, 2005 Posts: 15226 Location: Bradford, West Yorkshire
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Posted: Fri Jul 04, 2008 9:31 am Post subject: |
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the cyclops database file is .gpi file just like those that poiloader creates so we know 3 things:
1) .gpi files can handle directional data
2) there MUST be a program (special version of poi loader?) that can create these
3) garmin are spoil sports
MaFt |
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Sallyann Lifetime Member
Joined: Jun 23, 2006 Posts: 768
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Posted: Fri Jul 04, 2008 10:08 am Post subject: |
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MaFt wrote: | the cyclops database file is .gpi file just like those that poiloader creates so we know 3 things:
1) .gpi files can handle directional data
2) there MUST be a program (special version of poi loader?) that can create these
3) garmin are spoil sports
MaFt |
So what does a .gpi file look like?
Sal |
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MaFt Pocket GPS Staff
Joined: Aug 31, 2005 Posts: 15226 Location: Bradford, West Yorkshire
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Posted: Fri Jul 04, 2008 11:14 am Post subject: |
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sallyann, there is software that can convert gpi to csv BUT the garmin database is, obviously, encrypted and cannot be converted this way. not sure on the legality of 'breaking' that encryption though...
MaFt |
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Darren Frequent Visitor
Joined: 11/07/2002 14:36:40 Posts: 23848 Location: Hampshire, UK
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Posted: Fri Jul 04, 2008 11:21 am Post subject: |
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If it were simple we'd have done it, the data is encrypted. Nothing illegal about attempting to decipher the encryption format if all you wish is to offer your own data in the same format.
What you can't do obviously is extract and use the their data not that we'd wish to as ours is far better! _________________ Darren Griffin
Last edited by Darren on Fri Jul 04, 2008 11:23 am; edited 1 time in total |
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Sallyann Lifetime Member
Joined: Jun 23, 2006 Posts: 768
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Posted: Fri Jul 04, 2008 11:22 am Post subject: |
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It would depend on the licence conditions that came with the software. Usually, but not always, there is a clause that forbids reverse-engineering. Someone with a licence would have to check.
Edit: Darren, I never suggested it would be simple. Hard just takes longer.
Last edited by Sallyann on Fri Jul 04, 2008 11:24 am; edited 1 time in total |
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Darren Frequent Visitor
Joined: 11/07/2002 14:36:40 Posts: 23848 Location: Hampshire, UK
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Posted: Fri Jul 04, 2008 11:24 am Post subject: |
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Sallyann wrote: | It would depend on the licence conditions that came with the software. Usually, but not always, there is a clause that forbids reverse-engineering. Someone with a licence would have to check. |
This isn't reverse engineering in the normally accepted sense though. Reverse engineering to extract data etc for nefarious purposes is one thing but doing so in order to understand a file format or encryption method as in this case cannot be prohibited. _________________ Darren Griffin |
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Sallyann Lifetime Member
Joined: Jun 23, 2006 Posts: 768
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Posted: Fri Jul 04, 2008 11:29 am Post subject: |
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I would go along with this definition from Wiki
"Reverse engineering (RE) is the process of discovering the technological principles of a device, object or system through analysis of its structure, function and operation." |
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Darren Frequent Visitor
Joined: 11/07/2002 14:36:40 Posts: 23848 Location: Hampshire, UK
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Posted: Fri Jul 04, 2008 11:45 am Post subject: |
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Indeed, and my point was that you can't forbid this type of reverse engineering, see here.
Quote: | In general, the DMCA bans malicious reverse engineering. However, there is an exception in the DMCA saying that reverse engineering can be done under the purposes of inter-operability between software components. |
All moot anyway as being encrypted its unlikely to be easily understood. This isn't a file format such as .ov2, not impossible given time perhaps but realistically not feasible _________________ Darren Griffin |
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Sallyann Lifetime Member
Joined: Jun 23, 2006 Posts: 768
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Posted: Fri Jul 04, 2008 12:12 pm Post subject: |
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Darren,
I don't think we are in disagreement.
There is a huge amount of case law about this and as a software developer I try to keep it touch with it. The most crucial thing though it what the individual software licence says. It should specify what can be done or not done by the licensee, and it over-rides any general principles.
I am just a little surprised though that you say "All moot anyway as being encrypted its unlikely to be easily understood." How heavily is it encrypted? Has anyone actually tried? |
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Darren Frequent Visitor
Joined: 11/07/2002 14:36:40 Posts: 23848 Location: Hampshire, UK
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Posted: Fri Jul 04, 2008 12:46 pm Post subject: |
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I can email you a sample file if you want to take a look? _________________ Darren Griffin |
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