[Talk-GB] We're missing changes to M1 Junction 36 which have apparently been in place for a year.

[Paul Berry]

I intend to take a spin around the linked roundabouts this evening and try
to capture a trace or two...

Regards,
*Paul*

On Wed, 13 Feb 2019 at 21:00, Warin <61sundowner at gmail.com> wrote:

> On 14/02/19 03:42, Ed Loach wrote:
> > Paul wrote:
> >
> >> Jerry,
> >>
> >> No worries. I think I'll still pop down for a survey anyway because I
> now want to
> >> try the GPS + car trick and see how it turns out. We'll compare
> changesets later :)
> > Much of Clacton was originally mapped using that method, when there was
> no imagery covering the area.
> > https://www.openstreetmap.org/user/EdLoach/traces/page/79
> > When imagery and OS opendata became available it was usually pretty
> close. I was using (and still use) a Locosys GT-31.
> >
> > I have seen areas where the uploaded traces and the OSM roads seem to
> follow the pavement in the imagery and suspect it was mapped by a walker
> who hadn't adjusted for not walking down the middle of the road (I'm not
> talking a constant offset here as it depended which side of the roads they
> were walking).
>
> Same applies for car traces. Best to average multiple trips in both
> directions.
>
> >
> > Accuracy will depend on the receiver and signal reception.
>
> Yep. Multiple trips can help with everything but reception problems caused
> by local obstructions (buildings, cliffs etc.
>
>
>
>
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