What I used before was Overviewer (https://overviewer.org/)
It was a command line program that ran on the server and exported the results to a google map.
Not exactly a straightforward windows app.
You could give the following a shot, it's documentation for those not as comfortable with the command line as the rest of the documentation assumes.http://docs.overviewer.org/en/latest/win_tut/windowsguide/
Hey Ash , when we played Minecraft before you showed me this map tool that would show us the world we were playing in and any building , digging etc...
My son is really into Minecraft atm , and would like that .. you remeber that app ?