[Talk-GB] accurate GPS

Simon Ritchie simonritchie.uk at gmail.com
Wed Oct 9 11:05:08 UTC 2019

I believe that the original data from the OS is completetrigarchive.zip.
Ian Harris created the trigpointing .uk website from that.  The map
references for the three trig points I used are from that website, and yes,
you can walk up to those trig points and plonk your GPS device onto them.
The problem, as I said, is that you don't know quite where they are.

The OS no longer use most of the concrete trig points scattered around the
country, they use accurate GPS, in fact I believe that they sell some of
their data to companies like Trimble and Leica, who sell it on for a hefty
monthly fee.  I think you are referring to their list of GPS stations.



On Wed, Oct 9, 2019 at 11:49 AM Russ Garrett <russ at garrett.co.uk> wrote:

> On Wed, 9 Oct 2019 at 11:40, Andy Robinson <ajrlists at gmail.com> wrote:
> > Are you using trig points that are also OS Net station locations?
> https://www.ordnancesurvey.co.uk/legacy/docs/gps/OSNet_GPSWebSite_Coordinates_File.txt
> Pretty sure that all those OS Net locations are actually fixed GPS
> receivers rather than trig points, and so not something you can go and
> plonk your GPS receiver on. The file definitely seems to list the
> model of receiver at each one.
> Cheers,
> --
> Russ Garrett
> russ at garrett.co.uk
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