Very often there is need to read very small letters or signs on map. Digital zoom (without level change) would help visually impaired people
Due to the high resolution of the iphone screen,. maps created for desktop use become almost unreadable on an iphone. It would be very useful to add an option to define a "digital zoom" in %. For example 200% will magnify the maps by two. See for example Orux Maps, Option Default Zoom, up to 300% (Android), a description can be found here:
http://oruxmaps.foroactivos.net/t2961-oruxmaps-on-a-phone-with-hd-screen