a mosaic of aerial photographs marked as a map, with grid lines, place-names, etc.
verb (used with object), pho·to·mapped, pho·to·map·ping.
to map by means of aerial photography.
Origin of photomap
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a map constructed by adding grid lines, place names, etc, to one or more aerial photographs
verb -maps, -mapping or -mapped
(tr) to map (an area) using aerial photography
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012