How do you estimate overall length?

The Government has hired people just for this purpose, they are strategically placed at the entrance of National Parks. These people have gone through a rigorous 3-day course of training in order to use the eyeball method. They can sometimes be identified by low slung jeans, baseball caps turned backwards, & ear piercings among just a few identifiers. Most will serve 2-years in this capacity, but those that do 6 years get full benefits & normally go on to be Lobbyists for large corporations, or teach Common Core math to the elderly.:B

If you are interested, applications are taken the day prior to November 4th every other year. Go online to www.iwantinonthis.gov