different between orthophotograph vs orthophoto

English

ortho- +? photograph

orthophotograph (plural orthophotographs)

ortho- +? photo

orthophoto (plural orthophotos)

An aerial photograph that has been geometrically corrected (orthorectified) such that the scale of the photograph is uniform, meaning that the photo can be considered equivalent to a map.
Synonym: orthoimage
- 2012, T. J. Blachut, A. Chrzanowski, J. H. Saastamoinen, Urban Surveying and Mapping, Springer Science & Business Media (?ISBN), page 293:
  Orthophotos or orthophoto mosaics enhanced by additional symbolized, planimetric information are called orthophoto plans. An orthophoto plan with added contour lines is a modern mapping product, called an orthophoto map.

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