On 30/10/2012 22:33, Dudley Ibbett wrote:
Hi
My version of JOSM seems to have just updated on my Fedora system and
I now have NLS OS 1:25k 1st Series 1937-61 imagery.
I am probably behind the times but presumably this can be used for
mapping. If someone could confirm its use this would be appreciated.
I appreciate its accuracy will need to be considered along with all
the other data sources.
Yes. In the UK, "Crown copyright", under which OS maps are published,
extends for 50 years. So as long as there are no maps beyond 1961, using
them is fine.
If it can be used it will be very helpful as it has field boundaries
as well as public rights of way. There are a number of other imagery
data sources that have also been added but not all seem to display.
I certainly use them for both in the slow-changing Yorkshire Dales and
they are also a great source of rural names. Note two things: Alignment
is OK but not brilliant, due to paper stretch and the survey techniques
used at the time, you will constantly have to re-align to GPS traces
every couple of kilometres or less. And secondly the paths are just
paths and do not signify any public right-of-way. I usually map them,
(diligently using the source tag as well as access=unknown), and then go
out and see if they are there. A surprisingly large proportion simply
no longer exist in any form and need to be removed.
Good luck!
Mike
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