The Sites and Monuments Map Viewer for NI
Give it a few seconds to load then zoom in to see archaeological sites, wrecks, defence heritage, aerial imagery and more
This link loads the search engine Duckduckgo that uses Apple Maps. When it loads click the Satellite logo at bottom left
An alternative satellite map. When it loads choose 'Aerial' at top right where it says 'Roads'
Standard Google maps, shows an alternative aerial view
Public Record Office Map Viewer
Gives you access to old 6" maps, parish and townland boundaries
Republic of Ireland Historic maps and sites
The 1st Series 6" maps also covers Northern Ireland where other resources the maps may be missing
Mapbox Basic alternative Satellite Map Viewer
Just a alternative base map which may have a different satellite image
This is an app and needs to be downloaded and installed, well worth it though.
NI Sites and Monuments Register file for Google Earth Pro and GIS
This is an app and needs to be downloaded and installed, well worth it though.
These maps give historic flooding and potential climate change flooding indications (2080) for rivers and the sea
Down Survey of Ireland Maps (1656-1658)
Taken in the years 1656-1658, the Down Survey of Ireland is the first ever detailed land survey on a national scale anywhere in the world.