(obsolete; lack of space; symbolized (or shown)) (2-23)
FRAME 2-24. INFORMATION FRAME.
Preliminary study of an area can also be made by using existing aerial photos. These can be in the form of a
series of overlapping vertical photos, paired and viewed through a stereoscope to allow the perception of depth.
They may be low or high oblique photos, taken from an aircraft with the camera at an angle to the ground. Area
studies can also be made on photo maps or photomosaics, made by paneling together a series of adjacent photos to
form a composite picture of a larger area.
TURN TO BOTTOM OF PAGE 23 FOR FRAME 2-25.
Ground reconnaissance is preceded by map and aerial reconnaissance whenever conditions permit. The ground
party can then verify or modify the preliminary data through close-range inspection.
Information obtained by preliminary map or aerial reconnaissance is ________________________ by ground
TURN BACK TO TOP OF PAGE 2-2 FOR FRAME 2-49.