Hi, I am surveyor and want buy a Phantom in order to use it for mapping and 3D modelling. I can't decide which to buy, the Phantom 4 or the Phantom 3 Adv/Pro. I like the extended battery of the P4, but I read in the forums that the real battery life is about the same with the P3P. If this is true then i suppose that the P3 Adv/Pro is a better buy for the price and the usage as a mapping tool. I want also to ask what is the best and most reliable mission planning software to use with the phantom. I have found pix4d capture, dronedeploy and "map pilot for dji". Currently only the dronedeploy supports P4 and the others will follow i suppose. If any user have experience with mapping please let me know.