Interactive Administrative District Map of Ireland These maps show all townlands, the 1851 and 1861 civil parishes, RC parishes, Baronies and PLUs for Armagh and Tyrone. The database is complete for all of Northern Ireland. It includes all districts in Northern Ireland: the names of all Counties, Poor Law Unions / Registration Districts, Baronies, modern Councils, RC Parishes, Civil Parishes as at 1851 (matching the 1851 census / Sean Ruad) and 1861 (matching the Griffith Valuation) and Townlands. It also includes boundary maps of all civil parishes (both 1851 and 1861 versions) as well as many townlands and other divisions. Although the database is complete, the mapping of the townlands is a "work in progress." This map is completely "live" and is very detailed!
Scotland, Maps of Free access, high-resolution, zoomable images of over 20,000 16th-20th century maps from the National Library of Scotland. Many Irish undertook annual seasonal work in Scotland, with many later settling there, these maps might be of assistance
with your Irish research.