ANALYTICAL IN-FLIGHT CALIBRATION

A general combined aerial triangulation and/or camera calibration program has been used to determine camera focal length, symmetric radial lens distortion, and decentering lens distortion for a Wild RC 8 aerial mapping camera equipped with Auiogon Lens No. 15UAg.312. Calibration was performed using the California Division of Highways Test area in Bishop, California with 14 and 21 aerial photographs taken from approximately 460 m above terrain having about 90 m relief. Three combinations of calibration parameters were utilized with four confiqurations of fixed ground control points using 14 and 21 photographs, respectively. Results are compared with each other and to the laboratory calibration of the lens. Calibrations with 21 fairly consistent and vary from the laboratory curve with discrepancies having RMSE of 2 micrometers. Tangential profiles are less consistent. Recovery of symmetric radial lens distortion parameters simultaneously with aerial triangulation is found to be feasible with photography having 60 per cent all-around overlap and with a fixed control point array of moderate density. Use of these added calibration parameters yields an improvement in planimetric position and elevation of about thirty percent. /Author/

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  • Corporate Authors:

    American Society of Photogrammetry

    105 North Virginia Avenue
    Falls Church, VA  USA  22046
  • Authors:
    • Anderson, J M
    • Lee, C
  • Publication Date: 1975-11

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Filing Info

  • Accession Number: 00128477
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 14 1976 12:00AM