Map differences, one reason we also wanted Geological maps is that the base
maps  of the first edition geological maps are also may be different from
the first edition OS !

We are also taking on board getting all the Tithe maps for our district in
digital form in conjunction with our newly formed Test Valley  Local Records
Society. Some maps are 16 feet square, early days yet but if we succeed we
will be providing in digital form to society members and other agencies
assuming copyright issues have been sorted.

   Frank Green

Heritage Officer

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-----Original Message-----
From: Crispin Flower [mailto:[log in to unmask]]
Sent: 05 February 2003 10:27
To: [log in to unmask]
Subject: Re: Digital Historic OS maps - Advice wanted


Hi Sarah
Bruce is right that we did this in WoSAS, way back in about 1995 (before
Landmark was available). We worked with the National Library of Scotland who
loaned originals for scanning (and who received the digital product), then
all images were georeferenced using the corner coordinates that can be
obtained from OS. We then improved the registration of some images on an
adhoc basis whenever required, particular to deal with the inserts (bits of
map that were printed onto a blank bit of an adjacent sheet). I think there
were about 400 map sheets, to cover 13,000 sq.km.
This was very successful, but I'm not sure how easy it would be to repeat.
The holders of originals might not want to subject the maps to the risks of
scanning now that there is a readily available digital copy.
Mind you, one rather interesting result of the WoSAS project was that there
are actually different versions of the 1st edition maps. For example I think
I remember that we had one showing the Fort Matilda coastal fortification in
Greenock, while another version (nominally of the same date and survey)
showed only a park and blank space!
cheers
Crispin

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Crispin Flower
exeGesIS SDM Ltd.
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Talgarth
Powys
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Fax: 01874 711156
email: [log in to unmask]
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-----Original Message-----
From: Sarah Orr [mailto:[log in to unmask]]
Sent: 05 February 2003 09:11
To: [log in to unmask]
Subject: Digital Historic OS maps - Advice wanted


Can I ask for advice about getting old OS maps for use on our GIS - is there
more than one way to obtain them or is Landmark the only source?  Is there
any way of making it more affordable?

Thanks
Sarah Orr
West Berkshire SMR
01635 519534


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