Coal DiverEverything you wanted to know about coal, but were afraid to ask.
Instructions
The left map is a satellite photo of a coal mine in the Powder
River Basin. The right is, by default, a political map of the
address you chose in the starting dialog.
Change the scale of the maps so that they match each other.
The rough outline of the coal mine will be shown on both maps.
When you have the correct scale, you will be able to see how big
the hole would be in your neighborhood.
When you think you know the answer, push the "Check Answer"
button to see if you are right!
How big is that hole?
In this demonstration, you will be shown two real Google
maps, but you won't be able to see what scale each map is set to.
The left is of a coal mine in the Powder River Basin.
The right is a map of an address that you choose. We
suggest choosing a geography you're very familiar with, for
example, your home address. For your convenience, we've already
typed in the address of the White House.
Your goal in the demonstration is to change the scale of the
maps so that they match each other. As a point of reference,
the rough shape of the coal mine will be shown on both maps.
When you have the correct scale, you'll be able to see how big
the hole would be in your neighborhood. You know the mine is
big, but do you know how big it is compared to where you
live?