The Irish OS maps are in two sets - Irish & Northern Irish

The NI maps use really bright colours for the different heights of contour and are a bit bright.

The OSI maps are pretty spot on. Detail-wise they are as good as the UK 50K maps. The OSI was established by the Brits back in 1839 and it's probably one of the only benefits of the occupation.

Of course, they only produced the OS maps so that they could move the troops around ....

Spanish OS maps are crap !!!!