[Talk-GB] SOTM 2007 - Liberating GIS from the OS

[Andy Robinson (blackadder-lists)]

John,

Can't answer your question as I've not heard anything regarding Mike's
activities in the last two years.

What I can tell you is that I've been beavering away collecting the
12:25,000 scale out of copyright OS mapping. I only currently have around
15% of the 2027 maps that were printed originally by the OS but it's close
to being enough to start scanning and making available in the same manner
that Richard has done with the NPE 1:63,360 (1 inch) mapping. rectification
and accuracy is a lot better with these maps. My initial test indicated that
without further rectification I can get the positional accuracy to around
10m for the paper version of the maps, a little worse for the cloth backed
versions. They are dimensionally (printing) far better than the NPE set.

The 1:25,000 mapping is based on the old 6" scale maps from the late 19th
century, so they aren't that much use in urban areas, however for rural
England and Wales plus parts of Scotland they are a real boon as they show
field boundaries and a huge amount of other details that are still present
in the landscape.

If anyone has old 1:25,000 Provisional/First edition maps that they are
happy to donate to the cause I'd be most interested to hear from them.

Cheers

Andy 

>-----Original Message-----
>From: talk-gb-bounces at openstreetmap.org [mailto:talk-gb-
>bounces at openstreetmap.org] On Behalf Of John McKerrell
>Sent: 24 July 2009 10:32 AM
>To: Talk GB
>Subject: [Talk-GB] SOTM 2007 - Liberating GIS from the OS
>
>Hi
>
>At SOTM 2007 Michael Calder talked about a project he was working on
>to scan in all of the old out of copyright OS maps and then to
>digitise them to get georeferenced raw data out. Since then I haven't
>heard anything about the project so I was wondering if anyone knows
>what he's up to with that? His email address is on his user page but I
>thought I'd ask here first rather than hassle him directly. There's a
>bit more info on his user page here:
>
>http://wiki.openstreetmap.org/wiki/User:Michaelcalder
>
>Any clues? No particular reason for asking but for some reason I
>remembered the project last night and I'm sure by the time-scales he
>mentioned he should be well underway.
>
>John
>
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