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Ordnance Survey - using a 'Get a map'

Sunday, and a chance to play. I've been interested in the possibilities offered by Ordnance Survey's "Get a map" service - which allows (with limitations described on their site) their mapping to be captured and used on web sites in a not-for-profit way.

I've started to put up a whole load of pictures for visitors to Melksham and the surrounding area and I felt that I would like to be able to show where each of the pictures was taken on a map. So ... I've spent the last hour writing a PHP script to get my maths right.


Image produced from the Ordnance Survey Get-a-map service. Image reproduced with kind permission of Ordnance Survey and Ordnance Survey of Northern Ireland.


For the more technical readers, I've put a copy of the script into our PHP / graphics, etc training area. It takes care of all the letters and digits of a grid reference - e.g. ST914628, and you can give it any map captured from the OS provided that you tell it the centre grid reference of the image and how wide (in kilometres) the area covered is. It does the rest!

(written 2005-05-22, updated 2008-05-10)

 
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The backtick operator in Python and Perl
1 in 48 steel
Sales - the alternative close
Ordnance Survey - using a 'Get a map'
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Programming languages - a comparison
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This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

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