HEIGHT MEASUREMENTS FROM SATELLITE IMAGES

An instrument, the Zoom Height Finder, has been developed to investigate the possibilities of economically deriving height information from satellite images. Measurements of several stereopairs of Skylab photographs produced on color, color-infrared, and panchromatic films, and of overlapping Ladsat images recorded on successive orbits resulted in minimum height difference errors or plus or minus 50 to plus or minus 300 m and absolue elevation RMSE's of plus minus 150 to greater than plus or minus 300 m. Base-height ratios varied from 0.10 to 0.26, and the precision of stereometer measurements ranged from approximately plus or minus 3 to plus or minus 8 mu m depending on the viewing magnification employed and the resolution (R) of the images. From these measurements to optimum viewing magnification was determined to be equivalent to 0.7R + 7. Improved b/h ratios and lower altitudes are required to obtain significant improvements in heighting accuracies. /Author/

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  • Supplemental Notes:
    • Presented at the 42nd Annual Meeting of the American Society of Photogrammetry, Washington, D.C, February, 1976.
  • Corporate Authors:

    American Society of Photogrammetry

    105 North Virginia Avenue
    Falls Church, VA  USA  22046
  • Authors:
    • Welch, R
    • Lo, C P
  • Publication Date: 1977-10

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Filing Info

  • Accession Number: 00167901
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 16 1978 12:00AM