Hi,
On 27/10/2020 06:18, Adrian via Talk-GB wrote:
I agree with Rob that the misalignment of 5m is obvious if you look at Hugh
Town (Scilly). Both if you compare with the OSM data and if you compare with
the tracklogs that have been uploaded to OSM. So this transformation won't do.
I think
I can confirm that the Land Registry wms parcels appear to have been converted
with the Helmert 7-element transformation (no look-up table). This gives a
misalignment of up to 5 metres. It's ironic that the Land Registry don't seem
to know where their parcels are to better than 5m.
Now we
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