Vertical Photography Information
Vertical Aerial photography requires a specially modified
aircraft, such as Winged Eye, LLC uses. The aircraft is modified
by addition of a belly hole to allow the camera to point straight
down through the bottom of the aircraft.
The camera is mounted in a custom-made mount that allows the
photographer full control of the camera while in flight.
Vertical shots can be a single shots of a particular area,
a line of shots stitched together for one long picture, or
several lines of pictures put together for one large picture.
GIS, GPS Tagging and Geo-Correction:
Vertical pictures are automatically geo-tagged by a GPS unit
connected directly to the camera. Using this information,
ground-control points from the USGS DOQ (Digital Ortho-Quadrangle)
and GeoMapper software, the vertical pictures can be
sized, scaled and saved as GeoTIFF images. This ground-control
correction is referred to as Geo-Correction. It will work
in most GIS software packages.
Picture Resolution - How much can I see ?
Resolution of vertical pictures is measured in either Feet/Pixel
or Inches/Pixel. The resolution available depends primarily
on the altitude above ground level (AGL) of the camera. The
amount of area covered by each picture is also primarily dependent
on altitude above ground level.
5,000' AGL: Picture width 0.6 miles (3,353'), picture height
0.44 miles (2,307'), resolution of 0.64 ft/pixel (7.7 inches/pixel).
10,000' AGL: Picture width 1.3 miles (6,706'), picture height
0.87 miles (4,613') resolution of 2.5ft/pixel (30.6 in/pixel).
To obtain the best resolutions requires lower altitudes.
If the picture required doesn't fit the camera/altitude capabilities,
then multiple pictures of the area are needed. Those several
pictures will then be stitched together to form the single