ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.
One of a set of tools we're offering as a way to say thank you for being a part of the community.
Go to http://stevemorse.org/jcal/latlon.php and look at the right hand box. That seems to be what you're looking for. If you dig into the page's code, you should be able to tap this free resource to get the output you're looking for.