printing a huge image on wallpaper

i have a future project that involves printing a huge image that i will generate and have printed onto wallpaper to be installed on a wall to be a big wall sized mural. things i would like to know about this include the printing resolution. i have been searching for general wallpaper info and have quite a number of different widths and lengths of wallpaper rolls. i want to be sure i have correct edge markings on each roll to be sure it is easy to line up the image on the wall correctly. does anyone here on LQ know anything about computer generated wallpaper images, or good resources to find out what to do? i am only generating the image. i am not installing any wallpaper. both American and European standards would be good to have info on.