On 23/06/2025 16:28, Colin Smale wrote:
In the past I'm sure boundaries were legally described in text, which was then transposed onto maps by OS or whoever. These days it's the map (i.e. OSGB36/WGS84 coordinates) that's definitive, and any alignment to other features is "coincidental" or "ephemeral" (it might appear to align today, but that's no guarantee for tomorrow). In any case that would explain why these annotations are becoming scarcer.
Incidentally, I've just been looking at the Parliamentary Constituencies Order 2023, and it looks like, while parliamentary constituency boundaries in England are indeed now defined by reference to a map, in Scotland and Northern Ireland they're still defined by textual descriptions of physical features, including a bunch of centrelines of rivers and roads and railways. (In Wales the parliamentary constituency boundaries don't seem to have any existence independent of pre-existing local government boundaries, so the issue doesn't arise.)
--
Kind regards,
Dan Hatton
Dr. Daniel C. Hatton
E-mail: [email protected]
Signal: dch.28
SIP: [email protected]
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