[gpm]

This is cool.

I suspect that the value (white to dark scale) should be proportionate to votes/square km (or even better votes/pixel, since the projection isn't perfect at preserving area) instead of just number of votes though. In the current formula a huge county with 1000 is as dark as a tiny county with 1000 votes, but is visually much larger.

[st1ck]

Exactly. It'd only make sense when 2 counties, each with area S and N votes would have same color as a county with area 2 * S and 2 * N votes.

[mygo]

agreed. on it =)