Morris L. McKenzie 1973 <p>Maps with aerial photograph image bases have gained wide&nbsp;popularity. The orthophotomap presents an abundance of ground detail&nbsp;and information that cannot be shown on a line map with standard&nbsp;cartographic symbols. In preparing a map base covering areas of little&nbsp;relief, the imagery is fitted to map control with a conventional rectifier,&nbsp;but for areas of significant relief, the photographs are reproduced in an &nbsp;orthophotoscope to remove the effects of both camera tilt and terrain&nbsp;relief.</p> application/pdf en U.S. Geological Survey Photoimages for map bases article