Other map collections

• The British Library Map Collections
• Maps in The National Archives
• National Library of Scotland map collections
• Bodleian Library Map Room
• Cambridge University Library Map Department
• The Map Library, Trinity College, Dublin
• National Maritime Museum, Maps & Charts
• Royal Geographical Society (with the Institute of British Geographers), Collections, Maps & Atlases
• United Kingdom Hydrographic Office Archive
• Royal Commission on the Ancient and Historical Monuments of Wales
• Powys County Archives Office, Map Collection
• Geography and Map Division, Library of Congress
• Le département des Cartes et Plans, Bibliothèque nationale de France

National Mapping organisations

• Ordnance Survey
• Ordnance Survey of Northern Ireland
• Ordnance Survey Ireland
• British Geological Survey
• United Kingdom Hydrographic Office
• British Antarctic Survey
• U S Geological Survey
• Institut Géographique National (France)
• Instituto Geográfico Nacional, República Argentina

Other cartography related organisations

• British Cartographic Society
• Society of Cartographers
• The Charles Close Society for the study of Ordnance Survey Maps
• Association for Geographic Information
• The Geological Society
• International Cartographic Association

Online maps, atlases & datasets

• Natural Resouces Wales: Maps
• National Library of Scotland : OS Six-Inch maps of England
  and Wales, 1842-1952
• Great Britain Historical GIS Project
• United Nations Cartographic Section
• CIA World Factbook
• Cheshire Tithe Maps Online

Online Gazetteers

• Archif Melville Richards: place-name database
• GEOnet Names Server