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 149

  • One Inch Sheet 149 South Merioneth 1903 - published 2002; introduction by Alan Leather

    This Inch to the Mile map covers the southern part of Merioneth, with coverage stretching from the coast eastward to Machynlleth and Llanwrin, and from Barmouth and Dolgellau southward to Tywyn. Cader Idris is a dominant feature on the map, and other natural features include part of the Dovey Valley, Tal-y-llyn Lake, and the Afon Mawddach. Railways creep up several of the valleys, including the Tal-y-Llyn Railway and the Corris Railway. On the reverse we include a large extract from Merioneth Sheet 42.08 showing Upper Corris in detail, including Abercorris Slate Quarry, Abercwmeiddaw Slate Quarry, and some of the narrow gauge mineral lines that served the area; the extract stretches eastward to Garnedd-wen and a station on the Corris Railway.


    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: Barmouth, Capel Arthog, Dolgelley or Dolgellau, Llangelynin, Llangryn, Llwyngwril, Pennal, Towyn or Tywyn.
  • Montgomeryshire: Llanyrin, Machynlleth, Penegoes.

    For a full list of maps for Merioneth go to the Merioneth page; or to the Wales page for a full list for the country.

    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 / 28 December 2005