The map was created by the Center for Range Voting, which was founded by math PhD Warren Smith and engineer Jan Kok to float innovative election reform proposals. To make it, they used what they call the shortest splitline algorithm. Basically, they used the shortest possible line to cut a state into two halves with roughly equal populations. Then they did so again, and again, and again, until they had the proper number of overall districts.
Here is the U.S. Map
Of course we will NEVER see such an equalizing map ever! After all, this isn’t a real democracy at all!