[Talk-GB] Oxford UK 1:2500 O/S maps from 1958: copyright status of in-house copies?

[Tim Waters (chippy)]

2009/2/14 Andrew Chadwick (mailing lists) <andrewc-email-lists at piffle.org>:
> Thomas Wood wrote:
>> I've begun rectifying some of them by eye, but it really should be
>> possible to transform them, since they are maps with a grid in a known
>> projection (OSGB36, I assume)..
>> All we theoretically need to do is map the image pixels to OSGB refs,
>> then let a tool rectify them to whatever projection we want.
>
> Thanks for that - I made a little Perl script for doing the four
> corners, http://osm.pastebin.com/f3fa44b1a , so all I'd have to do is
> manually locate the corresponding corners on the original. Using
> Geo::Coordinates::OSTN02 should make that as accurate as possible.
>
> The 1km square images are so big I'm having to crop and shrink them into
> (NW, NE, SW, SE) quarters and upload them separately. Feed in a 4-figure
> square ref like "SP5206" and it'll spit out the WGS84 (GPS) coordinates
> of the four points at the corners for each one of these slices. Hope
> that makes sense!
>
> I really wish warper allowed you to stitch multiple uploads from the
> same source together into a scrollable, WMSable whole by tag or somesuch.

Great idea, and it's in the pipeline :-)

Tim