FRAME 2-2.
__________________________ and _______________________ information of engineer interest.
(currency) (2-25)
FRAME 2-26.
Photos can be used to up-date obsolete maps because they can be flown, processed, and distributed in a few
days, compared to the many months required for new mapping.
Photos are a valuable supplement to older maps because they can be used to ____________________________
map information.
2-5