Hi! We see you’re using an ad-blocker. We’re fine with that and won’t stop you visiting the site.
But as we’re losing ad-revenue from this then why not make a donation towards website running costs?. Or you could disable your ad-blocker for this site. We think you’ll find our adverts are not overbearing!
I too have switched from Garmin (i3) to Tomtom (740 Live) and am disappointed with the accuracy of the maps.
I live in a development in a major UK city built over two years ago, with a hotel and public carpark adjacent to my apartment block. None of these show on the Tomtom map, none of the postcodes are present, and the road layout around all of these is still that of early 2006. All of the above are present and correct on Google maps, for what its worth.
That old i3 never skipped a beat the whole time I had it. Perhaps I should have kept it.
Joined: Feb 27, 2006 Posts: 14893 Location: Keynsham
Posted: Mon Feb 16, 2009 12:33 am Post subject:
Malouff wrote:
They also should fix there rounding of kilometers to miles
I think the biggest problem is that they convert everything to kilometers that are rounded to the nearest 5 or 0
For example if I enter in 30 Miles per Hour = 48.28032 Kilometers per Hour
TomTom does not show however that it is rounding 48 to 50
So when it gets converted back
50 Kilometers per Hour = 31.068559611866696 Miles per Hour
We also know that TomTom does not store any decimal points
Right, so what made my road 29mph when I input 30 just as a test? _________________ Dennis
Right, so what made my road 29mph when I input 30 just as a test?
I have no idea why there are differences like that.
Perhaps the navcore version used has something to do with that.
I don't see why they would save the decimal point if everything does supposedly get saved as Kilometers per Hour.
Even if they do save the decimal point, I don't see why for one person it round up a mile and for another it rounds down.
The math conversion should be a constant unless the formula for conversion was changed between navcore versions and that would explain the difference.
29 Miles per Hour = 46.670976 Kilometers per Hour
I don't think that the TomTom would let you enter in 46 Kilometers per Hour
Try switching the units of measurements to Kilometers and see what it has for the road you tested on.
I am thinking it would be 45 Kilometers per Hour
I don't understand how it got to be 29 Miles per Hour as that would be 46 Kilometers per Hour.
Also if you are testing using Kilometers I suggest your try changing the speed to 46 Kilometers per Hour and check the road again and see if it does again come up as 46 in driving view or 29 Miles per Hour.
I also think you can Correct by making a correction to the same road again and seeing what comes up for the default speed for that road.
Joined: Dec 06, 2003 Posts: 335 Location: North Surrey (TW17) UK
Posted: Mon Feb 16, 2009 10:35 am Post subject:
I don't personally have to much of a problm with incorrrect maps, a combination of street signs and rapid rerouting on my TT normally solves any problems.
However, where I do find a major problem is TT's attitude to 'private' roads. I go to a lot of airports for example, and although the internal roads are clearly shown on the map, TT usually, but not always, refuses to navigate through them. There is a particular trading estate off the A40, which has about 9/10 internal roads, and shows up on map view, but TT always reports 'no route found'. i've also had the same problem with National trust properties for example. If the roads are in the database, why can't they treat it as they do toll roads, ie warn that the detination has no public access, but then let you navigate there? _________________ Go740L App 9.510 Europe 985.8155
RDS_TMC mount
Home 2.8.3.2499 Win10 Home
Joined: Mar 01, 2005 Posts: 1513 Location: West Mids
Posted: Mon Feb 16, 2009 10:40 am Post subject:
Malouff wrote:
Even if they do save the decimal point, I don't see why for one person it round up a mile and for another it rounds down.
The math conversion should be a constant unless the formula for conversion was changed between navcore versions and that would explain the difference.
I think that is what happened. In one navcore, some speeds were displayed incorrectly. When the next one came, some of those originally wrong were corrected but others then changed (almost as if they rounded everything up pushing some up too high). I still say rounding to the nearest 5 would be the fix.
I am amazed how long it takes some changes to make it. Round here, there was a big new road build (round Moor St station) which took ages to appear (one road longer than the rest). I'm still waiting for the access to the Bullring carpark to be corrected. _________________ Gerry
TomTom730T
Cameralert for Android
Brodit ProClip mount
However, where I do find a major problem is TT's attitude to 'private' roads. I go to a lot of airports for example, and although the internal roads are clearly shown on the map, TT usually, but not always, refuses to navigate through them. There is a particular trading estate off the A40, which has about 9/10 internal roads, and shows up on map view, but TT always reports 'no route found'. i've also had the same problem with National trust properties for example. If the roads are in the database, why can't they treat it as they do toll roads, ie warn that the detination has no public access, but then let you navigate there?
Private roads can get into the database from all sorts of sources - other maps, satellite images, etc. However I don't believe TeleAtlas - or NavTeq - actually drive private roads. So there isn't navigation info for these. It seems that these could be driven in your case, but considering the general case, how can someone driving those roads figure out not only whether they can legally drive them, but whether the satnav user can safely drive them? Corollary: If you live in a (new) private development and don't want SatNav directed traffic, stick up private sign quick
One thought on the long delays to get into a map: often these road changes are often brought in by councils as temporary measures for a year. Certainly this is what they did here when they reversed the flow of the main streets. So, should a mapping company add the change to the map? It might take 6 months to get into the releases, and by then the council might have undone it if it didn't work. After a year, it was then approved as permanent, and at that point it will approved. And only then does it make sense for the change to be made to the master maps. Thus the change may be two years to get released.
Now, with map share I was able to make the change myself, and was correctly guided from then on. (Ironically, I note that my new 740 thinks the road is still wrong!)
There are roads, shops and a petrol station near me, which have been there longer than I have lived here, which is nearly 5 years and they still don't show on tomtom's latest map!!
Joined: Mar 18, 2004 Posts: 789 Location: Midlands UK
Posted: Tue Feb 17, 2009 8:35 pm Post subject:
bullyterrier wrote:
There are roads, shops and a petrol station near me, which have been there longer than I have lived here, which is nearly 5 years and they still don't show on tomtom's latest map!!
A dual carriageway has been here at least 5 years, yet it's still shown as single carriageway on TomTom, and all internet TeleAtlas maps, but on Streetmap.co.uk and others it shows correctly.
I have reported it years ago, but it never get's fixed.
It's really annoying that TeleAtlas don't update their maps, even though a 3-year old child could do it quicker.
Posted: Today Post subject: Pocket GPS Advertising
We see you’re using an ad-blocker. We’re fine with that and won’t stop you visiting the site.
Have you considered making a donation towards website running costs?. Or you could disable your ad-blocker for this site. We think you’ll find our adverts are not overbearing!
All times are GMT + 1 Hour Goto page Previous1, 2, 3
Page 3 of 3
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
Or you could disable your ad-blocker for this site. We think you’ll find our adverts are not overbearing!
Hi! We see you’re using an ad-blocker. We’re fine with that and won’t stop you visiting the site.
But as we’re losing ad-revenue from this then why not make a donation towards website running costs?. Or you could disable your ad-blocker for this site. We think you’ll find our adverts are not overbearing!
Forum FAQ
Search
Usergroups
Profile
Log in for private messages
Log in
