It's like looking at the blue gradation of land value for your Sim City map, but its actually Manhattan 2006.
Whats interesting is that the old "Exception to all the rules" New York is at it again. This time breaking the Cardnal rule that land value is higher near the waterfront. I Guess who can blame them when they have to look at Jersey
In reality it probably has more to do with the data on this Building Heights map