The information age really has caught up with OS hasn't it!



To ensure that any paper copies of online material accurately reflect the
situation on the ground at the date of survey I think this should be
published as well as the edition date.



I have done quite a bit of work with early 20th century 1:2500 plans where
the date of survey is some 9 months earlier than the edition date and
railway historians in particular have cited OS edition dates as evidence of
a railway not being in use whereas it was in fact open by the time of
publication but 'under construction' at the time of survey. This 'correction
factor' needs to be applied to all Popular Edition, Seventh Series and early
Landranger maps



I purchase digital data from OS in preparing Land Registry submissions and
have to presume that the data is up to date within a year or so in the case
of new buildings but there is no indication of the date or source of other
detail. I suspect some detail such as field boundaries is still as plotted
during the reconstitution of County series plans with only visual
corrections from air photos.



I would be very interested to know how accurate various elements of detail
are would welcome an explanation of the significance of the different layers
on the plans when supplied as .DWG files



John Hobden



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