Miss Nancy, state and national flags are not subject to copyright laws, since no one using them could possibly claim that they were original artwork in and of themselves.  And, anyone is entitled to reproduce the image, the more accurately the better.

Images of such maps sold by companies are generally treated more like stock image collections, where it is the collection that is copyrighted to prevent further distribution of the work.  So, say you find a great image of the US Flag, you can't just add that image to your own collection and distrubute it for cash.  However, you can give it away, and other people can use it for commercial and/or non-commercial artwork.

Could be worse, could be raining.