Discussion of the scaling of the map by Harry Stern, 6 Oct, 2005.

First I drew the Arctic map using a polar stereographic projection.

Then I drew the US map (orthographic projection with equal scaling

in X and Y directions) and adjusted the overall size until it was right.

By "right" I mean that one degree of latitude on the Arctic map

is the same number of centimeters as one degree of latitude on the

US map. Colorado is exactly 4 degrees of latitude north-to-south,

so that was my standard for the US map. On the Arctic map I used the

distance from the pole to 80N. I got it pretty close by eye, then

I printed a hard copy and measured with a ruler and made a final

adjustment to the size. Neither projection is equal-area and the

scale actually changes in both projections as you move from the

middle to the edges, but not by much.