High Resolution 1:10,000 scale Mapping Strategy of Multi ... - NDMA

o In the upper left-hand corner: Date of exposure, time, focal length,
RF scale, and the flight height of the camera (aircraft) above the
mean ground elevation or some set datum
o In the upper right-hand corner: Project number, flight line number,
and the identifying number of the exposure itself.
2. Intermediate Exposures: All intermediate exposures shall be identified in
the direction from project beginning to project end. Exposures shall be
labeled in the upper right-hand corner as follows:
o Project number, flight line number, and the identifying number of
the exposure itself.
Each container should be labeled to show the corresponding municipalities and
counties, the legislated route designation, photographic scale, date of exposure,
and any applicable aerial number on the first and last exposure of each strip.
PHOTOGRAPHY METHODS AND GUIDELINES
FLIGHT LINE
The Contractor shall design the flight lines to insure full stereoscopic
photographic coverage. In general, flight lines shall be parallel to each other and
to the lengthwise boundary lines of the areas to be photographed.
WEATHER AND SUN ANGLE
Aerial photography shall be undertaken only when well-defined images can be
obtained. Photography shall not be undertaken when the ground is obscured by
haze, snow, foliage, flooding conditions, or when clouds or cloud shadows would
appear on more than five percent (5%) of the area of any one photograph.
138