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 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 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