Historic maps

Old maps at various scales can be obtained from specialist map-dealers, second-hand bookstores and elsewhere. Copies will often be found deposited in libraries or museums. A few specialist publishers offer ‘new’ versions of old maps.

‘Six inch’ and ’25 inch’ maps

Of particular interest to local historians and indeed anyone wanting to look at changes in the landscape over the past 150 years are the 1:10560 (6″-mile) scale and 1:2500 (25″-mile) scale sheets published by the Ordnance Survey.  6″-mile sheets covering the Powys, RCT and Merthyr Tydfil sections of the Geopark can be inspected at Brecon library and those for the Carmarthenshire section at the record office in Carmarthen.

A search on the web will reveal that both originals and facsimile copies of these sheets and others can be purchased from various sources.

You can also view all of the published historical six-inch scale (1:10,560) Ordnance Survey maps of the Geopark area on-line for free at the National Library of Scotland’s website. Maps at other scales are available here too though not (yet) at the twenty-five inch (1:2500) scale.

‘One Inch’ maps

Three series of historic maps covering the whole of England and Wales at 1:50,000 scale are published by Cassini Maps.  Each map is available at £6.99.

Cassini Old Series maps

Reprints on modern OS Landranger sheet-lines of black and white mapping from 1805 to 1874. Three sheets of this series give complete coverage of Fforest Fawr Geopark.  Ideal for comparing the modern landscape with that of up to two centuries ago.

Cassini New Series maps

Reprints on modern OS Landranger sheet-lines of sepia-tinted mapping of the area in 1900-1901.  See what a century of change has done to the area.

Cassini Popular maps

Reprints on modern OS Landranger sheet-lines of colourful mapping from 1919 to 1926. Three sheets of this series give complete coverage of Fforest Fawr Geopark. Ideal for comparing the modern landscape with that of nearly 80 years ago.

Sheet numbers for all three Cassini series covering the Geopark:

  • No.146: Lampeter & Llandovery
  • No.159: Swansea & Gower
  • No.160: Brecon Beacons

Check out www.cassinimaps.co.uk.