New to the site and to photography, and it seems as though I have an advanced technical question. I'm trying to get some images printed for posters that are 36" in height. The printing company is telling me that the image I provide to them has to be 36" in height and 100ppi. The image that I am sending is 180dpi (which they have told me is the same thing as ppi), but it is obviously not 36" in height. Is the height of the image that can be printed have anything to do with a setting on my camera? Thanks for your help in advance.