Could someone check a UK postcode for me?

finisterre · Occasional Visitor Joined: Sep 02, 2006 Posts: 16

N1 1LX is located in Liverpool Road, Islington, London.

When I look it up on TomTom it gives me Lonsdale Place, Islington, London.

Anyone else get this? If so, any idea why?

Thanks,

Fred.
(PocketPC with V6.010 (7720) and Western_and_Central_Europe v675.1409)

mostdom · Posted: Mon Oct 15, 2007 2:35 am Post subject:

Just tried both on Google maps and the are so close together, they could well be the same location. I also tried it on the teleatlas report site and it shows the postcode it the right place.

It could be a fluke, but if it is a concern you could report the error to teleatlas on thier website.
_________________
Dom

HERE LIES PND May it rest in peace.
Navigon 7310/iPhone Navigon&Copilot

finisterre · Occasional Visitor Joined: Sep 02, 2006 Posts: 16

Thanks Dom, but I did a reverse look-up on the post code and ALL addresses in it are LIVERPOOL ROAD addresses.

Can anyone try a look-up in TomTom.

Thx.

Oldboy

finisterre · Occasional Visitor Joined: Sep 02, 2006 Posts: 16

Thanks Oldboy. It's at least nice to know why it happens.

I wonder if they'll ever be able to come up with a better and more foolproof solution.

Oldboy · Posted: Mon Oct 15, 2007 9:00 am Post subject:

I think while Snap-to-Road is used, there will always be a problem.

However I think I would prefer not to see my position wandering off the road graphic while I'm driving along a road. Wink

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Richard

TT 910 V7.903: Europe Map v1045
TT Via 135 App 12.075: Europe Map v1140

Calomax · Posted: Mon Oct 15, 2007 9:12 am Post subject:

Different but similar problem. A couple of weeks ago I set TT to navigate me to Eastleigh, using city centre as the address. It actually took me to the centre of Chandlers Ford which is about 4 miles away.

But I have now tried using advance planning to find a route from the centre of Chandlers Ford to the centre of Eastleigh and it worked fine.
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TT Go Essential

Oldboy · Posted: Mon Oct 15, 2007 9:18 am Post subject:

City Centre (or Town/Village) behaves in a weird fashion sometimes. It seems to depict an area, rather than a location.

If you use Travel via, it will often just skirt round the Ring Road/Bypass and not even enter the City/Town/Village.
_________________
Richard

TT 910 V7.903: Europe Map v1045
TT Via 135 App 12.075: Europe Map v1140

barryd · Posted: Mon Oct 15, 2007 11:49 am Post subject:

In TomTom Navigator 5.21 on my Pocket PC this postcode works fine. It shows as Liverpool Road in the list and displays on the map as Liverpool Road 201-279/130-164. So presumably a postcode data issue between versions.
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Barry Davies

trafcam · Regular Visitor Joined: 30/10/2002 11:57:49 Posts: 155

Just had a quick look at the Postcode Address File (PAF) data from the Royal Mail for that postcode, and it seems to show as 53130 East, 18400 North. If you put that into www.streetmap.co.uk (you have to enter the postcode, then edit the obvious numbers in the address bar, including adding a zero on the end of each as they appear to use metre-precision) it does in fact point to Lonsdale Square. The numbers they (streetmap) have for N1 1LX are different, though, so I don't know where they come from. It implies that TomTom uses the PAF data, though.

I don't have that level of detail from later versions of the file (the one I quoted is probably a couple of years old) so I can't say whether it's changed. The grid easting and grid northing for a given postcode are the distance east and north, in tens of metres (hence the adding a zero earlier) to the mean centre of the postcode from a point a little south west of the Scilly Isles. Given the odd shape of some postcode areas I guess it's likely that some data might cause this issue, also there is no way to know the size of a postcode area from the data, only it's centre point.

Oldboy · Posted: Mon Oct 15, 2007 6:06 pm Post subject:

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