Erroneous Warning When En-Route.

mjandar · Posted: Sun Jan 14, 2007 5:22 pm Post subject: Erroneous Warning When En-Route.

Could someone please do a demo route for me and explain the following.

South bound on the A1, near to Morpeth in Northumberland (70mph limit) and he PGPSW databaseslip shows a mobile camera "Mobile:21596@30" on the slip road from Morpeth as it approaches the A1.

With my device set to "Warn Only When On Route" it should ignore that camera but actually gives an alert.

Why is this? Is it a database error or have I set something up wrongly? I only have the PGPSW database installed.

Oldboy · Posted: Sun Jan 14, 2007 5:33 pm Post subject:

It shows as being about 150 yards from the A1. Usually this is enough to escape the 'acceptance angle'.

It could be that as the software locks to the road, the A1 on the Device may be drawn sveral yards to the SW. If this is the case, and if the true distance is reduced to 75 yards this might be enough to trigger the warning.

Does it also Warn if you travel from the South?
_________________
Richard

TT 910 V7.903: Europe Map v1045
TT Via 135 App 12.075: Europe Map v1120

mjandar · Posted: Sun Jan 14, 2007 5:48 pm Post subject:

Yes, it is also detected when travelling on the A1 from the South even with "Warn only When On Route" selected. It is in fact quite some way off route.

missing_user · Joined: Aug 30, 2008 Posts: -7

It is fault that occurs when the camera location is not placed on a road.
This camera is not on a Garmin road, it is 27 to 30 feet from any road so you unit does as mine does - it gives me a warning!

The database can easily be updated in the next 2 weeks if you visit the location and give an exact 'fix' and submit it!

I had two similar oroblems on the M4.

Andy_P · Posted: Sun Jan 14, 2007 6:38 pm Post subject:

I have seen lots of examples of this on the M4, where mobile locations on the roundabout at the end of the slip-road trigger alerts when driving on the main motorway.

If you go to "Browse map..." and tap the main motorway at or near one of these junctions, (so the road is highlighted), you will see that the slip road also gets selected, so the unit is seeing them both as part of the route.

It seems to happen to me more than it used to, so I blamed recent software revisions; but it could actually have been a "feature" all along, and I only noticed it when I increased the warning distances for mobile sites.

mjandar · Posted: Sun Jan 14, 2007 6:52 pm Post subject:

Strumble wrote:
The database can easily be updated in the next 2 weeks if you visit the location and give an exact 'fix' and submit it!

I'll do that asap but it won't be until I come back from a sunnier climate in a couple of weeks time so I will miss the next deadline.

I presume then that the original notified location was erroneous in not being located at the roadside.

Andy_P · Posted: Sun Jan 14, 2007 7:10 pm Post subject:

It won't help. If you read my previous post, if the map says the slip road is part of "the route", moving the camera slightly will make no difference.

mjandar · Posted: Mon Jan 15, 2007 8:50 am Post subject:

OK, now I understand how it's happening.

However, this is an entry slip road, not an exit so it could never be part of anyones route on the A1.

It's a slip road that I never ever use so MY only answer, to stop the erroneous warning, would be to deleat it from my device. I presume that the problem is not with the PGPSW database (in which case they could fix it) but with the mapping details.

Andy_P · Posted: Mon Jan 15, 2007 10:57 am Post subject:

missing_user · Joined: Aug 30, 2008 Posts: -7

mjandar · Posted: Mon Jan 15, 2007 4:05 pm Post subject:

I think it's worth a try. Strumbles co-ordinates of N55.13969 W1.68289 look more accurate to me and if it doesn't work nothing would be lost but we all just might learn something.

Spot on accuracy in our (PGPSW) database is worth striving for so, even if errors are only corrected one at a time, eventually ..............

So how do I get this request/suggestion through to MaFt?

Andy_P

missing_user · Joined: Aug 30, 2008 Posts: -7

mjandar what unit are you using?

mjandar · Posted: Mon Jan 15, 2007 4:40 pm Post subject:

TT700 5.201

mjandar · Posted: Mon Jan 15, 2007 4:51 pm Post subject:

Just done it in demo mode again - travelling North toSouth on A1 - and using 2D map.

The warning fires when I am exactly opposite the camera although the camera itself is quite some distance away. I have my warning distance set at 599 yards for a mobile @30.

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