Old Ordnance Survey One-Inch Maps


These maps are taken from the famous OS "Inch to the Mile" Maps. Though obviously far less detailed than the large scale maps for which we are perhaps better known, they provide an invaluable overview of a wider area, typically 18 miles across by 12 miles down. For transport historians they are invaluable for showing old railways, while all historians need them for their close depiction of topography, including parish boundaries. These maps also mean that we can offer historical coverage for small villages where a large scale map would not be commercially viable. We intend to publish the whole of England and Wales in this series. Almost 200 titles are now available and we aim to publish three new titles each month. The maps include historical notes and all (except the double-sided Tyneside title) also include a large scale map of a small town or village in the area.

The maps are neatly folded and each includes a specially written introduction to the area. Maps can be purchased on our On-line Mapshop where further information about titles is given. Visit the One Inch Page for a full list of Inch to the Mile Maps, or The Index Page for a full list to the series and details of Prices.

Here is information about Sheet 136:

  • One Inch Sheet 136 Lake Vyrnwy & Bala 1904 - published 2002; introduction by Derrick Pratt

    Two landscape features dominate this Inch to the Mile Map: to the north Bala Lake or Llyn Tegid, and to the south, Lake Vyrnwy, a great reservoir created in the valley and completed in 1891. Coverage of the map stretches from Drws-y-Nant station eastward to Pen-y-bont Fawr, and from Bala and Llandderfel station southward to Llanwddyn. As Derrick Pratt says, "most of the map is taken up with the backbone of the Berwyn Mountains, desolate, thinly populated moorlands" but the map also shows a long stretch of the Bala & Dolgelley line, and the final few miles of the Tanat Valley Railway. On the back we include an extract from Montgomery Sheet 4.12, showing Llangynog in detail, including the inclines up to the Craig Rhiwarth Slate Quarries.


    It is not possible to list the many hamlets, farmsteads and other topographical features shown on these maps. However, you may find it useful if we list the towns and principal villages or church parishes that are included on this map. Links are given for those for which detailed large-scale maps are also available.

  • Merioneth: Bala, Llanfor, Llangower, Llanuwchllyn, Llanycil.
  • Montgomeryshire: Hirnant, Llangynog, Llanwddyn.

    For a full list of large scale maps for Wales go to the Wales page; or to the One Inch page for a full list of Inch to the Mile maps.

    You can order maps direct from our On-line Mapshop. For other information and prices, and other areas, go to The Index Page.


    The Godfrey Edition / godfreyedition@btinternet.com / 29 December 2005