You will definitely be interested in a St Lucia Map if you are planning a St Lucia trip. As with most vacation destinations there are quite a number of island maps all with varying degrees of detail. Today there are also lots of apps for your phone that will make navigating St Lucia far easier than it was just a few years ago.
So you should have no problems at all exploring Saint Lucia. Trouble though is that there are so few road signs that you can slip from one community to the next and never even know the you had crossed some sort of imaginary boundary