LAC 43:XXVII.725. Aerial Camera

A. Each aerial camera used shall be a precision aerial mapping camera of equivalent or better quality than a Wild RC-10, Zeiss RMKA, or Jena LMK equipped with a low distortion, high resolution lens and image motion compensation. A USGS Camera Calibration Report on each camera used shall be submitted to the responsible contracting authority, and only the camera and magazine reported in the Calibration Report shall be used for photography. Each report shall not be more than four years old before the photography is flown. B. The mean radial lens distortion (D0) as defined by the USGS Camera Calibration procedures, is the average distortion for a given field angle from 7.5 degrees through and including 40 degrees. The calibrated focal length shall be 153 millimeters + 3 millimeters (nominal 6-inch focal length). The Area-Weighted Average Resolution (AWAR) of each camera lens shall not be less than 45 lines as determined by the USGS Camera Calibration Report. The two surfaces of the filter on each camera used for aerial photography shall be within 10 arc seconds of being parallel as verified by the USGS. C. Each camera used shall expose a minimum of four midside fiducials. The mechanical precision of the perpendicularity of the midside fiducials shall be within at least one arc minute of exactly 90 degrees. Each magazine used for each camera must have a platen that does not depart from a true plane by more than 0.005 inches. Image Motion Compensation must be in proper operating condition for all photography flown.