THE BRITISH LIBRARY

Maps and views blog

2 posts from February 2012

27 February 2012

Success in "placing" historic maps

The crowdsourcing effort described in my last post was, I am happy to say, complete in less than one week. Many thanks to all that participated! Maurice Nicholson of Bedford submitted the most maps, and he will be in for a visit to the British Library in a couple of weeks.

Below is a visualisation of the maps completed (before any error-checking!)

Envelopes

All of the maps in the project are still open for editing. Adding more points - spread across the entire map - will improve the accuracy of the data. From here, simply click on the red marker representing the map you wish to edit to enter the Georeferencer tool. If you have local knowledge of an area, we'd appreciate you reviewing what's there to ensure the best fit and minimise errors.   

Because of the quick work, the newly-georeferenced maps were integrated into the JISC-funded Old Maps Online, in which The British Library is partnering, in time for its launch. More on that soon...

Get in touch via [email protected] if you wish to be contacted when the next batch of maps is ready for georeferencing.

14 February 2012

Georeferencing maps online - will it work?

We're asking the online public to undertake a task beyond our own means: to georeference some of our treasures of British mapping. http://maps.bl.uk

The maps included represent a very small sample, to be sure. But the the Ordnance Survey Drawings are some of the most enquired-after maps we have, being unique manuscript documents that portray the lanscape of England and Wales before the onslaught of industrialisation made its mark.

  GE - Exeter4
This is a detail of OSD 40, pt. 3. In 1801, Exeter was a small and compact town!

The other collection we've included in this effort is a selection of the Crace Collection of Maps of London. I've found these maps to be more difficult to georeference, and am eager to see how others fare with them.

The project web page is http://maps.bl.uk - there is a short video there and detailed instructions. Access is also available from within the map pages in the Online Gallery. Please try this new tool out, as it will be a great help towards improving access to and visibility of these collections!