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A comment on What's the Most Concave State in the U.S.? Using R to Solve a Geography Puzzle. Parent comment

Re:What's the Most Concave State in the U.S.? Using R to Sol... by homeomorphic on Wednesday September 25, 2013 @11:46AM (#6445267)
It doesn't matter. He's counting the number of times a continuous curve C on the surface of the Earth crosses other continuous curves (state boundaries). A crossing is a property of the curve and its embedding onto the Earth's surface. While a (continuous) map projection can deform both C and the state boundaries, it cannot create or destroy crossings.

To draw the crossings, however, he needs to pick a projection and project both C and the state boundaries, which I guess is why he included some PROJ.4 calls.

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Re:What's the Most Concave State in the U.S.? Using R to Sol... by abstrakraft on Thursday September 26, 2013 @05:23AM (#6449680)
It does matter - he only considers continuous curves that are projected onto straight lines, which is a property of the projection.
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