Found this while trying to see how big Ireland was in comparison to the state I live in. (Comparisons are easier for me than measurements.) It's fun!
http://overlapmaps.com/index.php
http://overlapmaps.com/index.php
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature currently requires accessing the site using the built-in Safari browser.