Distance Measurement Tool

[kjh21]

I would like to incorporate into my own Maps v3 application (with some
modifications) the Distance Measurement Tool the appears in the map on
maps.google.com.

I'd like to keep the on-map control/behavior but redo altogether the
accompanying control and presentation that appears on the sidebar.

I'm pretty adept at adopting and adapting (as well as adipting and
adupting) functionality like this.

I couldn't find any code at

google-maps-utility-library-v3

or

gmaps-samples-v3

and thought I would ask here before doing a deep dive into the
minified/obfuscated code served up by maps.google.com.

[Esa]

There is a ruler tool in the Demo Gallery
http://code.google.com/apis/maps/documentation/javascript/demogallery.html?searchquery=ruler