THE BRITISH LIBRARY

Maps and views blog

18 posts categorized "Crowdsourcing"

13 October 2020

The K.Top: 18,000 digitised maps and views released

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Today we release 18,000 digital images of historic maps, views and texts from the Topographical Collection of King George III into the public domain.

The collection has been digitised as part of a seven-year project to catalogue, conserve and digitise the collection which was presented to the Nation in 1823 by King George IV. This is the first of two planned image releases.

The images are made available on the image sharing site Flickr, which links to fully searchable catalogue records on Explore the British Library.

Maps_k_top_121_35
The 'Duke's plan of New York. London, 1664. Maps K.Top 121.35.

For the first time, anybody who wishes to can remotely view, search, research and enjoy one of the world’s richest and most varied public collections of the history of place.

The idea of remote or virtual travelling is a particularly common one today thanks to the seamless interfaces of online map viewer that simulate the idea of airborne travel and evoke the excitement of discovery. However, the idea of virtual travel has a long history, and is well illustrated by the travel-averse king who resided in his palaces and viewed the world through his collection of maps and views. This is the Google Earth of the late 18th century and the journeys it can take you on are no less informative, intriguing, and instructive of the many facets of past eras.

Maps_k_top_6_95_i
Thomas Milne, Milne's plan of the cities of London and Westminster.... 1800

 What is K.Top?

The King’s Topographical Collection (K.Top) is one part of the Geographical Collection of King George III (the other parts are the Maritime and Military collections). The nucleus of the collection was assembled from 1660, but added to considerably after 1760 by the king’s librarians and agents. The collection was presented to the British Museum (from 1973 British Library) as a distinct part of the King's Library in 1823,. For more on the history of the collection see this post by Felicity Myrone.

What is in it?

It’s probably easier to list what isn’t in this collection. It totals around 40,000 printed and manuscript maps, views, charts, texts, architectural plans, prints, atlases and ephemera. The collection is arranged geographically, with around 40% dedicated to the British Isles, one third covering the Europe of the Grand Tour, and 10% for British areas of influence such as North America, the West Indies and India.

Maps K.Top 23.21.2.h.
Nicholas Hawksmoor, 'The West front of Waping (Wapping) Church Stepney,' Aug. 1714. Maps K.Top 23.21.2.h.

 What themes does it include? 

Too many to mention, but here’s a sample: landscape, tourism, antiquarianism, architecture, rural life, fine art, agriculture, medieval and church studies, urban planning and development, industrialisation – canals and transport, military history, the history of collecting, the history of cartography, the Grand Tour, royal palaces and stately homes, science and invention, the history of exploration, American Independence. 

As a product of the 16th-19th centuries, the collection is also associated with imperialism, and the role of maps in facilitating imperialist activities both practically and ideologically. We hope that the release of this material will facilitate research and greater understanding of these aspects of the past.  

How can I access it?

18,000 images are available via the file-sharing site Flickr, which you can find here https://www.flickr.com/photos/britishlibrary/albums/72157716220271206

Images from the collection are also tagged George III Topographical Collection https://www.flickr.com/photos/tags/georgeiiitopographicalcollection

There are links to full Marc cataloguing records on Explore the British Library. To view a digital image from the catalogue record on Explore, select 'I Want This' and then 'View Online Digital Item.'

maps_k_top_83_61_k
Molo di Napoli, con terribile eruzione del Vesuvio mandata fuori la sera de 15 del mese di Giugno, 1794. Maps K.Top 83.61.k.

 How about georeferencing?

Glad you asked. For those of you who like a challenge, we have made all of the maps from this release available on our Georeferencer Tool.  See how you get on with geolocating the maps. Some will be easier than others.

What can I do with the images?

You are free to study, enjoy, download and remix these images as you see fit. When doing so, please bear in mind any potential cultural or other sensitivities associated with them. Importantly, we’d really like to know what you are doing with the images so please let us know @BLMaps or by emailing maps@bl.uk, we’d love to hear from you.

Maps_k_top_6_17
[Thamesis Desriptio] / Robert Adams authore 1588. Maps K.Top 6.17.

 

Who do we have to thank?

So very many people. Here goes:

Generous trusts and individuals including the American Trust for the British Library, Art Scholars Charitable Trust, Blue Rubicon, Viscountess Boyd Charitable Trust, Christies Education, Coles Medlock Charitable Foundation, Cornwall Heritage Trust, Cumberland and Westmorland Antiquarian and Archaeological Society, Daniel Crouch Rare Books, Dunard Fund, The Eccles Centre for American Studies, Englefield Charitable Trust, Edward and Dorothy Cadbury Trust, Hadfield Trust, John R Murray Charitable Trust, Ken Biggs Charitable Trust, Samuel H Kress Foundation, Langtree Trust, London Historians Ltd, London Topographical Society, Maunby Investment Management Ltd , PH Charitable Trust, Peck Stacpoole Foundation,  Pitt Rivers Charitable Trust, Reed Foundation, Sylvia Ioannou Foundation, Swire Charitable Trust, Swinton Charitable Trust, Trefoil Trust, Turtleton Charitable Trust, Cyrus Alai, Caroline and Peter Batchelor, Michael Buehler, Tom Boyd, Richard H Brown, Claire Gapper, William B Ginsberg, Jaime Gonzalez, Martin Halusa, Jerome S Handler, Peter Holland, Tina Holland, Arthur Holzheimer, J Michael Horgan, John Leighfield, Norman Leventhal, Sri Prakash Lohia, Tom and Hilary Lynch, Lynda Partridge, Robert E Pierce, Carolyn Ritchie, David Rumsey,  J T Touchton, Tony and Maureen Wheeler, Peter A Woodsford and others who wish to remain anonymous.

Dedicated project staff Felicity Myrone, Hugh Brown, Alex Ault, Mercedes Ceron, Kate Marshall, Magdalena Kowalczuk, Oliver Flory, Grant Lewis, Rebecca Whiteley, Marianne Yule, Sileas Wood, Tom Drysdale, Tamara Tubb, Fred Smith, Jeremy Brown and Emily Roy.

Also very dedicated British Library colleagues Louise Ashton, Filipe Bento, Kate Birch, Michele Burton, April Carlucci, Alan Danskin, Silvia Dobrovich, Adrian Edwards, Roger Gavin, Tony Grant, Karl Harris, Mahendra Mahey, Scot McKendrick, Victoria Morris, Magdalena Peszko, Gethin Rees, Sandra Tuppen, Mia Ridge and Joanna Wells.

And finally, none of this would have been possible without the efforts of Peter Barber, Head of British Library Map Collections until his retirement in 2015, in promoting the research value, relevance and importance of the King’s Topographical Collection to existing and new audiences.

11 August 2020

Goad Maps on Layers of London

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I'm very excited to announce that the georeferenced versions of the British Library's Goad fire insurance maps now form a layer on the Layers of London platform[https://www.layersoflondon.org/]. Their addition to the Layers of London web map interface would not have been possible without the addition of thousands of control points added by our georeferencer community. Thanks so much for all their help, please take a look at the maps in all their glory here

These control points allow the images to be positioned in geographical space and therefore viewed as layers alongside the other maps and data contributed by a wealth of esteemed organisations like British Historic Town Atlas, Historic Towns Trust, London Metropolitan Archives, British Library and MOLA, National Library of Scotland, the National Archives and Historic England [https://www.layersoflondon.org/map?layers=true] Most importantly they can be viewed alongside the contributions provided by the general public on the Layers of London platform. I am particularly pleased that the work of the Georeferencer volunteers has been used to enhance and enrich historical contributions on another volunteer-driven platform. The Goad maps are described on the Layers of London platform as follows:

'The British Library holds a comprehensive collection of fire insurance plans produced by the London-based firm Charles E. Goad Ltd. dating back to 1885. These plans were made for most important towns and cities of the British Isles at the scales of 1:480 (1 inch to 40 feet), as well as many foreign towns at 1:600 (1 inch to 50 feet).'

Goad_Layers of London1
Goad Maps layer in Layers of London platform, London and Tower bridges, 1887

The Goad maps are well-suited to the Layers of London platform as they depict a critical period in London's urban development:

'This detailed 1887 plan of London was originally produced to aid insurance companies in assessing fire risks. The building footprints, their use (commercial, residential, educational, etc.), the number of floors and the height of the building, as well as construction materials (and thus risk of burning) and special fire hazards (chemicals, kilns, ovens) were documented in order to estimate premiums. Names of individual businesses, property lines, and addresses were also often recorded. Together these maps provide a rich historical shapshot of the commercial activity and urban landscape of towns and cities at the time.'

Goad_Layers of London2
Goad Maps layer in Layers of London platform, Tower of London, 1887.

The project are now looking at potentially making several others sets of London maps available as layers on their platform, more details to follow. Finally, the Layers of London team have been kind enough to share the web map tiles that they created from the GeoTiff rasters back to the British Library. Thanks to the team for providing these. The tiles will save other projects time and Living with Machines[https://livingwithmachines.ac.uk/] are already keen to use them.

Gethin Rees 

28 April 2020

Another big list of where to find British Library maps online

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In a previous blog I described the best free-to-access digitised British Library maps available on the Library’s own site. But there are more. Lots more!

Where we’ve worked with other institutions, organisations and individuals on digitisation, we’ve been pleased for those institutions to host the resulting content on their own sites. Often, the maps we’ve provided form a subset of a wider collection drawn from a range of other sources. So it isn’t just about the spirit of collaboration, but the enormous research benefits to be drawn from a broader and more integrated picture.

In the fullness of time you can expect to see this content also hosted on the BL's Universal Viewer. For now, here are some of the riches and where to find them.

Wikimedia Commons Collections

https://commons.wikimedia.org/wiki/Category:Collections_of_the_British_Library

There’s a ton of British Library content on Wikimedia Commons which is great because of the open access nature of the site and its clear usage terms. Maps are included in a range of categories, including the Off the Map videogame competition and Images Online (the British Library’s commercial imaging site). But the main category, labelled maps collections, contains 28,000 images. Three main ones are

Ordnance Surveyor drawings - https://commons.wikimedia.org/wiki/Category:Ordnance_Survey_Drawings

800px-Ordnance_Survey_Drawings_-_Reading_(OSD_126)
Robert Dawson, [Ordnance Surveyor Drawing of part of Berkshire], 1809. Maps OSD 106 

 

These 321 maps are some of the earliest works by the Ordnance Survey of Great Britain, which was formally established in 1791 to map southern England in response to the threat of invasion from France. The phrase ‘scope-creep’ is something of an understatement when applied to the OS, whose work continues to the present day. These large ‘fair drawings’ are the maps produced by the earliest Ordnance Surveyors of parts of England and Wales from the 1790s to the 1840s, and it’s from these that the one inch to the mile ‘Old Series’ printed maps were derived. The maps were received in 1958. For close, local work, there’s really nothing better than these for the period.

Goad fire insurance maps - https://commons.wikimedia.org/wiki/Category:Goad_fire_insurance_maps_from_the_British_Library

Lossy-page1-509px-Insurance_Plan_of_Sunderland;_sheet_7_(BL_148844).tiff
Charles C. Goad Ltd., Insurance plan of Sunderland, sheet 7, 1894. Maps 145.b.12.(8.).

Charles Goad’s maps are incredible windows into Britain’s urban past – stupidly detailed late-19th and early 20th century maps of various towns produced in order to assist the calculating of fire insurance risk. To do this, the maps included not only tell us the shapes and forms of buildings, but what they were made of, and who was using them and for what. Over 2,500 here for you to savour. Goad mapped other world cities including a large number of Canadian towns.  

War Office Archive - https://commons.wikimedia.org/wiki/Category:War_Office_Archive_%E2%80%93_East_Africa

Thanks to the Indigo Trust, over 1800 East Africa maps and materials from the wider WOA have been digitised and placed here for your study and enjoyment. They’re also georeferenced. Hurrah!

Maps of Qatar and the Middle East

https://www.qdl.qa/en/search/site/?f%255B0%255D=document_source%3Aarchive_source&f%5B0%5D=source_content_type%3AMap

Through the Library’s partnership with the Qatar National Library, over 1300 maps of the area, drawn mostly from the India Office Records, have been catalogued and uploaded onto their digital library portal.

American Revolutionary War Maps

https://collections.leventhalmap.org/collections/commonwealth:hx11xz34w

Commonwealth_hx11xz37q_access800
Daniel Patterson, Cantonment of His Majesty's forces in North America... 1766. Add.MS 11288

In collaboration with the Norman Leventhal Map and Education Center at Boston Public Library, 377 maps of North America and the West Indies from the American Revolutionary War Era were digitised and placed on the Center’s educational site. Ten other partners including the Library of Congress also contributed material. The British Library's contribution includes maps from the King’s Topographical Collection and Royal United Services Institute, which itself contains maps from the collection of Jeffery Amherst (1717-1797), commander-in-chief of British forces during the Seven Years’ War.

Japanese produced historic maps

https://mapwarper.h-gis.jp/maps/tag?id=british+library

We digitised all of our pre-1900 maps of Japanese origin thanks to a wonderful collaboration with Ritsumeikan University, Kyoto. And what a collection – over 300 maps drawn from the Map Collection, the Western Manuscripts Collection, and Asian and African Studies Collection. Some of these maps arrived from earlier private libraries including the Engelbert Kaempfer and Philipp Franz von Siebold Collections. Some of them are very big indeed. You can access these maps through the Ritsumeikan University MapWarper portal.

Maps of Singapore and South East Asia

https://eresources.nlb.gov.sg/printheritage/browse/Charts_Maps_British_Library.aspx

The five-year project between the British Library and National Library of Singapore, generously funded by William and Judith Bollinger, enabled us to digitise and upload 300 maps onto the NLB Singapore’s web portal. These cover Singapore and its wider geographical context. 

Flickr maps

https://www.flickr.com/photos/britishlibrary/albums

In 2013 the British Library Labs’ Mechanical Curator project placed 1 million British Library images onto Flickr. They are images drawn from books digitised as part of the Microsoft Books project, and include an enormous wodge of maps (‘wodge’ in this sense meaning tens of thousands of maps). See this individual album containing over 25,000 maps https://www.flickr.com/photos/britishlibrary/albums/72157648036792880

These are the maps which are currently being Georeferenceed via the Library's Georeferencer tool http://britishlibrary.georeferencer.com/start

The Roy map of Scotland

https://maps.nls.uk/roy/

Roy composite
William Roy [A section of the military survey of Scotland], 1747-1755. Maps CC.5.a.441. 

And finally, just one map, but a very large and important one. This is the fair copy of General William Roy’s (1726-1790) map of Scotland produced between 1747 and 1755. The map is a landmark in British mapping for applying military surveying methods to a very large area, and is regarded as the precursor to the Ordnance Survey. It’s also highly regarded artistically, since it includes the hand of celebrated watercolour artist Paul Sandby (1731-1809). The map is part of the Kings Topographical Collection, having formed part of the collection of the Duke of Cumberland.

We’re delighted for the National Library of Scotland to host this map on their website, given its signal national importance. And they do a very good job of it too, with a superb interface and numerous layers, including a 3D one.

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I hope you find something here to interest and inspire you – and I’d be very glad to learn of any comments or questions you have, either by commenting here or on Twitter at @BLMaps.

Tom Harper

23 April 2020

A list of where to find free-to-access digitised British Library maps

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Here at the British Library we’ve been digitising our maps and making them available for over two decades now. Consequently, there’s a wealth of fantastic and inspiring free-to-view historic maps on the web. In addition to ever-increasing quantities of maps on our own platforms, our digitised maps are also hosted by other cultural institutions, organisations and individuals with whom we’ve been pleased to collaborate.

This seemed like as good a time as any to pull a load of them together and let you know about them.

So, in this first of two posts, here are a few of the places on the British Library’s site where you can find digitised maps, and upon finding them, use them escape to the ends of the earth (or the end of your street) from the comfort of your own home. Enjoy.

3D virtual globes

 https://www.bl.uk/maps/articles/european-globes-of-the-17th-and-18th-centuries

https://sketchfab.com/3d-models/willem-janszoon-blaeu-terrestrial-globe-1606-14a47c148bd446b2801c0b3fd7b58343
Willem Janszoon Blaeu's 1606 terrestrial globe. Maps G.6.b. 

We just did this, and we hope you like it. 3D virtual models of 10 of our historic globes from the 17th - 19th centuries with thanks to our Digitisation Services and digitisation company Cyreal. Another 20 will be added over the coming months.  

The Georeferencer

http://britishlibrary.georeferencer.com/start

The British Library’s Georeferencer isn’t strictly a collection of maps, since it draws its 56,000-odd maps from a variety of places (including the below sources). But you can definitely search for maps in it, for example by using this crazy map with all of the georeferenced maps located on it. Zoom in for it to make more sense, and find the area you’re interested in. 

The Shared Research Repository

The Shared Research Repository is a great place to find all sorts of British Library content, from catalogues to lists to PhD theses, to maps. This is a lively spot so keep checking in for stuff. Particular highlights are

Medieval maps and charts from the British Library and partners’ Shared Research Repository https://bl.iro.bl.uk/collection/b2393193-0749-4e81-991e-5cf394466b53

The Pelagios medieval maps project was a really excellent one which analysed and cross-referenced text contained in maps. with the added bonus of some digitised maps (thanks to funding from the A.W. Mellon Foundation).

British War Office maps of the former British East Africa  https://bl.iro.bl.uk/work/00de6f1f-a415-4b86-adb7-2a958cbdf085

Almost 600 maps, sketches and itineraries that formed the compilation material for published British War Office maps between 1870 and 1940. There is some amazingly detailed archival mapping in here. The work was generously funded by the Indigo Trust.

Picturing places

https://www.bl.uk/picturing-places/collection-items

https://www.bl.uk/collection-items/a-portolan-chart-by-petrus-rosselli
Petrus Rosselli, [Chart of the Mediterranean Sea], Majorca, 1465. Egerton MS 2712.

 

900 or so images, many of them maps from the King’s Topographical Collection, illustrating a series of new and repurposed articles on the subject of illustrating place. The project was generously funded by the Paul Mellon Centre for Studies in British Art, The Finnis Scott Foundation, Marc Fitch Fund and Coles-Medlock Foundation.

20th century maps

https://www.bl.uk/maps/collection-items

https://www.bl.uk/collection-items/schaffhausen-airey-neave-escape-map
Escape map of the Schaffhausen redoubt. War Office, 1940. Maps CC.5.a.424.

Here are round a hundred maps from articles produced as part of our 'Mapping the twentieth century: drawing the line' exhibition.

Online Gallery 

http://www.bl.uk/onlinegallery/onlineex/

The British Library’s Online Gallery was set up through the Library’s ‘Collect Britain’ project in the early noughties. There are thousands of maps on here, and although the Zoomify and browse facilities are no longer functioning (we’re in the process of migrating this stuff onto a new platform) there are still some great maps here, such as  

The Crace collection of maps of London

http://www.bl.uk/onlinegallery/onlineex/crace/index.html

http://www.bl.uk/onlinegallery/onlineex/crace/a/007000000000002u00056000.html?_ga=2.98418783.1764258415.1587371764-718070083.1508136830
Wenceslaus Hollar, A new map of the citties of London Westminster and ye borough of Southwarke..., London, 1675. Maps Crace Port 2.56.


One of the finest collections of historic maps of London anywhere, collected by a commissioner of London’s sewers and George IV’s interior decorator. Around 1200 maps from between around 1550-1850, digitisation generously funded in part by the London Topographical Society. Crace’s collection of London views are held by the British Museum. 

All the maps from the Online Gallery are also available (in higher resolution) alongside maps from other collections via the Old Maps Online portal (with its fun geographical search tool). https://www.oldmapsonline.org/

Turning the Pages

http://www.bl.uk/turning-the-pages/?id=223c7af8-bad6-4282-a684-17bf45bd0311&type=book

This is another older British Library resource but it has a couple of really choice atlases in it. Are there any more choice atlases than Gerhard Mercator’s hand-made Atlas of Europe of 1570 (which contains the only two surviving maps drawn by the man himself)? Or one of the volumes from the famous multi-volume Beudeker Atlas containing maps and views of Dutch stately homes from the 17th and 18th centuries.

Digitised Manuscripts

http://www.bl.uk/manuscripts/BriefDisplay.aspx

A number of maps and atlases held in the Western Manuscript collection have been digitised and found their way onto the Digitised manuscripts page. If you know what you're looking for you can search by pressmark. Or you can search by keyword (i.e. maps, plans etc.) if you're just browsing. 

Many highlights reside here, including the late 16th century Burghley-Saxton atlas (containing the first printed county maps of England and Wales in proof) at Royal MS 18.DIII http://www.bl.uk/manuscripts/FullDisplay.aspx?ref=Royal_MS_18_d_iii

Explore the British Library 

http://explore.bl.uk/primo_library/libweb/action/search.do?vid=BLVU1

http://explore.bl.uk/BLVU1:LSCOP-ALL:BLL01016593255
Jacques Callot, OBSIDIO ARCIS SAMMARTINIANÆ. Paris, c.1631. Maps C.49.e.75

The British Library's principal online catalogue does include thumbnail images for a tiny number of maps, but coverage is extremely uneven and the resolution of images is variable (to get a larger image for non commercial use, click on the map's title included in the right hand part of the details section). You may be lucky - for example if you're interested in Jacques Callot's map of the 1627 siege of Saint-Martin-de-Ré. 

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In a later blog I'll be listing non-British Library platforms and sites where you can find free-to-access British Library digitised maps. But in the meantime, I hope this keeps you busy.

Tom Harper  

10 August 2016

Hooked on Georeferencing

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Georeference NY

Above: a map of Manhattan from the US subset.

A funny thing happened last week as I noticed that the Georeferencer project's current phase had stalled around the 32% mark. Having checked on the project progress bar for a few days I decided we had lost momentum on the project, perhaps due to it being the summer holidays, personal commitments, a frustration with some of the content, or any other number of other reasons. Deciding I could not encourage more use without 'practicing what you preach' and getting stuck into the current cache of maps, I sat down in my breaks - for the first time in too long - to work through a chunk of the project using the lists of maps 'to be georeferenced' held on Wikimedia Commons.

After working my way through a number of maps I noticed two things. First off, progress on the Georeferencer project has not stalled, instead the counter on the front page has mysteriously stopped working (if you go there now you will still see it needs fixing). Instead, if you go to the 'Participants' tab you will see a different picture, one that suggests that, far from stalling, the project is actually charging along. At the time of writing 24,508 maps have been georeferenced, around 42% of what is currently in the system. The second thing I noticed was that I was hooked. Again.

Pandora voyage

Above: the route of the Pandora, from the Arctic subset.

Yes, despite the fact that there is no emergency or need to inspire more work on the system I'm still finding spare time to do 'just one more', the cartographic equivalent of computer gaming's 'One More Turn' syndrome. Now that I'm hooked I thought I would share some maps I georeferenced that worked out particularly well; the New York one lines up very pleasingly (grid systems make georeferencing much easier) while the map of the voyage of the Pandora satisfies my enthusiasm for Arctic maps, but, as usual, I have enjoyed working on every map I've done in this batch. I should probably back off a little now - not least as I have to sit down and write some talks around my new book - but I suspect I'll be dropping back in for 'Just One More Map' on a regular basis.

Thanks go out, as always, to our volunteers who are working through this large volume of material. We are making great progress here at the Library adding the data produced to catalogue records for the sheet charts, atlases and printed books that contain these maps and each newly georeferenced map means more useful data can be added to the catalogue. For those of you working on the project, don't forget about our lists of maps to be georeferenced over at Wiki Commons, they really do make the project more enjoyable - as I suggested in a previous post. For anyone reading this who wants to get involved in the project for the first time you can find out how here.

[PJH]

25 March 2015

Help! British Library needs 50,000+ maps georeferenced

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We have 50,000 maps online that we ask you - the public - to identify the geographical location of.   The BL Georeferencer release is now live at

http://www.bl.uk/maps/

Stockholm1
A plan of the city of Stockholm” published in 1802, overlaid on current Google mapping

Using the BL Georeferencer online application, you will be presented with a historic map from a 19th century book; by finding the location on a modern map or imagery alongside, the old map is “georeferenced”, and can be overlaid and interacted with in your browser (as above).

This is our largest release of maps yet, and will be a formidable task to complete, so any amount of help you can offer us will be gratefully received!

 

17 February 2015

Found: more maps than we’d reckoned

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Without looking, you can’t know what’s there. That was our experience locating maps amongst the one-million British Library images released to the public domain. We had not guessed that 50,000 images of maps were lurking there. So how were they singled out?

Answer: with the help of our friends (the crowd!) using several methods.

Semi-manually: A dedicated team of volunteers looked at individual images and applyied the tag “map” on flickr.  The work was organised using a synoptic index in Wikimedia Commons, providing a systematic method of looking at each volume and tracking shared progess. Over 29,000 map images were identified in this way.

Day-long event

The British Library hosted a one-day event, in concert with Wikimedia UK, to which volunteers were invited to kick-start the effort.  In between working, the 30 participants enjoyed tours and talks from speakers representing online mapping efforts, including OpenStreet Map and Stroly.  The day’s activities were captured in Gregory Marler’s engaging description, Lost in Piles of Maps, and a series of photographs from ATR Creative.  

Tagathon1a
One corner of the room - detail of photo by Machi Takahashi of ATR Creative who joined the event from Tokyo and was one of the speakers. CC BY-SA 2.0

Ongoing crowd activity

The bulk of the work took place online over the next two months. With the wiki tools built by J.heald to guide and coordinate contributions, 51 volunteers approached the work, book by book, often focussing on geographic areas of interest. Together, they made short work of what was a huge task; 28% of the books were completed after the first 72 hours; 60% were reviewed in the first 20 days; after five weeks over 20,000 new maps were found in 93% of the source volumes.

Automated methods

But surely maps can be identified automatically? It’s true that well before the organised effort just described, one user  produced algorithm-guided tags for this image set, which resulted in the addition of well over 15,000 map tags.

By the end of December 2014, every image in every book had been reviewed, and between the manual and automatic tagging, over 50,000 maps had been found. Since then, we have been working to clean up the data, including reviewing rogue tags, rotating images, splitting maps, and removing duplicates, to derive a final set of data. Next step: georeferencing.

The tagging project was presented on 12 February 2015 at the EuropeanaTech 2015 conference as a short talk and poster, Case Study: Mapping the Maps.

This achievement represents the work of many. Special thanks go to Maurice Nicholson, BL
Georeferencer participant; Jamed Heald, Wikimedia volunteer; and Ben O’Steen of BL Labs

04 November 2014

Maps Tag-a-thon: it’s online

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Online participation in the Maps Tag-a-thon, launched 31 October with an event here at the Library, is open!  We invite remote enthusiasts to get involved in the tagging so that maps can be identified and then georeferenced so as to offer full geo-functionality (public domain!). The aim to is to find every map from amongst the million images.

   BL Maps tagathon2

Nearly 33% of the books have been reviewed, with over 6,000 maps found, since Friday - that's only five days! If you can join us in this amazing effort, have a look at the instructions on Wikimedia Commons.

A report on the event will come soon, but I wanted to flag up this opportunity. Thanks to all the help from the British Library Digital Research Team, OpenStreetMap and Wikimedia Commons!