Saturday, 14 February 2026

TheGenealogist adds Large Scale 25-inch Historic OS Maps and LiDAR to its MapExplorer tool

From TheGenealogist (www.thegenealogist.co.uk):

TheGenealogist adds Large Scale 25-inch Historic OS Maps and LiDAR to MapExplorerTM

TheGenealogist has enhanced its MapExplorerTM historic map overlay with the addition of large-scale 25-inch-to-the-mile 1890-1914 Ordnance Survey (OS) maps, alongside a brand-new LiDAR mapping layer, giving family historians sharper ways to pinpoint where ancestors lived and understand the landscapes that shaped their lives.

The 25-inch OS maps are among the most detailed historic maps available for genealogy, showing features often missing from smaller-scale mapping: individual building footprints, property boundaries, yards, alleys, small lanes, wells, schools, chapels, mills, sidings, and other local landmarks. When used in MapExplorer’s overlay view, researchers can compare these fine-grain historic details against other map layers and modern geography to locate ancestral homes and communities with far greater accuracy.

Additionally, the newly released LiDAR (Light Detection and Ranging) maps bring another dimension to local history research. LiDAR reveals the shape of the ground beneath vegetation and modern land use, helping users spot historic earthworks, trackways, field systems, quarries, embankments, cuttings, and other “hidden” features, particularly valuable for rural research, lost buildings, and places where the visible landscape has changed.

“By adding 25-inch OS maps and LiDAR layers to MapExplorer, we’re giving researchers new ways to connect records to real places, right down to individual buildings and the landscape around them,” said Mark Bayley, Head of Online Content at TheGenealogist. 

The 25-inch-to-the-mile OS map layer and LiDAR maps are available now within MapExplorerTM at TheGenealogist.

Read about these new additions and how they can help reveal the landscape your ancestors knew here: https://www.thegenealogist.co.uk/featuredarticles/2026/lines-across-the-landscape-8934/.

** I asked what the coverage was, and the new additions cover the whole of Britain; it is hoped Ireland will be added in the future.

(With thanks to Paul Bayley) 


Chris 

Order Researching Ancestral Crisis in Ireland in the UK at https://bit.ly/4jJWSEh. Also available -Tracing Your Belfast AncestorsTracing Your Irish Ancestors Through Land Records, Sharing Your Family History Online, Tracing Your Scottish Family History on the Internet, Tracing Your Irish Family History on the Internet (2nd ed), and Tracing Your Scottish Ancestry Through Church and State Records - to purchase, please visit https://bit.ly/ChrisPatonPSbooks. To purchase in the USA visit https://www.penandswordbooks.com. Further news published daily on The Scottish GENES Facebook page.

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