1. A method for producing an display image for a display screen in an aircraft which is proximate to a surface of the earth, the method comprising: receiving information indicating location and pitch of the aircraft; using the location of the aircraft to access a topographical database and obtain terrain information regarding a region on the surface of the earth; producing a terrain image from the terrain information; associating a non linear pitch scale with the terrain image; and combining the terrain image and the non linear pitch scale into the display image.