Because I am not GIS expert, so may be my question a quite basic question in GIS. I am working on Texas area (The whole state) but when I want to use TIN it says it's recommended to use projected coordinate. When I come to find the block or unit of the area using UTM, I found there are three blocks cover the whole state (13, 14, and 15). My question is, which one should I choose to cover the whole state?
Thanks in advance