I have spent a lot of time recently working on reorganisation of Ireland categories, especially for County Antrim.
There are some great resources on the Internet which document Ireland places and provide maps, including townlands.ie, logainm.ie, placenamesni.org, PRONI historical maps, Griffith's Valuation. Unfortunately these sites don't always agree on townland, parish or county boundaries or spellings so in some cases maps from different sources need to be compared so a judgement can be made about what is correct.
A big part of the reorganisation work has been reviewing the categories assigned to exising profiles and updating them to the appropriate category in the new structure.
One profile I worked on was Alexander Graham.
Alexander's marriage record says he was from Shoptown in County Antrim, but Shoptown is not a known townland or modern settlement.
The placenamesni.org web site had an entry for Shoptown in Glenwhirry townland in Glenwhirry parish but Shoptown was not located on its maps.
I eventually found Shoptown on the Griffith's Valuation web site by searching on Glenwhirry parish and carefully examining the 1840 historical map.
That helped me to identify the correct location on Google Maps.
I later discovered Google maps does have a place named Shoptown but it is actually in the wrong place about half a mile to the east of the true location. In 1840 this place was known as Reddale.