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Subject: Re: Recalculating . . .


Author:
Andrew
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Date Posted: 11:33:31 11/01/14 Sat
In reply to: Wes 's message, "Recalculating . . ." on 13:25:35 10/14/14 Tue

It sounds very much as though that particular device was set up for someone on foot, that would explain most of the poor decisions it wanted to make.

I don't have one at present but had two over seven years until this summer. One would take me several hundred metres (and three lights) out of my way to reduce the distance I drove in a residential area by 50 metres, the second also had some pretty weird ideas at times. I routinely ignored them if I thought I knew better, of course some times they were right and I was wrong.

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Replies:
[> Subject: Re: Recalculating . . .


Author:
Allen McIntosh
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Date Posted: 20:06:28 11/03/14 Mon

>I may be old-fashioned and cantankerous, but I think
>I’ll stick with paper maps, thank you.

That works unless you get caught by one of the "errors" that mapmakers supposedly used to add to help them catch copyright violators.

There could also have been errors in the database of street segments. The database usually only contains the numbers at the ends of each segment, and the rest happens by interpolation. If the numbers are wrong or the geometry is wrong, ridiculous things can happen.
[> [> Subject: Re: Recalculating . . .


Author:
Brian Jones
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Date Posted: 17:43:51 11/06/14 Thu

Greetings

Here in Great Britain all the road maps are accurate. All generated by Ordnance Survey. However, street maps were often done by commercial publishers and they did add one or two 'features' to see if other publishers copied their maps.

Many years ago I had a friend working for the Ordnance Survey, who made the observation to map tracks through wooded areas it had to be done with paper and pencil on the ground.

http://www.ordnancesurvey.co.uk/

Brian


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