axis of homology
axis of homology[′ak·səs əv hə′mäl·ə·jē]
The intersection of the plane of the photograph with the horizontal plane of the map or the plane of reference of the ground. Also known as axis of perspective; map parallel; perspective axis.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.