This report pertains to research conducted in the applications of large scale analytical aerial photogrammetry to surveying for transportation systems. A demonstration of the improvement in accuracies of measurement of terrain elevation after special calibration is presented. New specialized hardware interfaced with a simple micro-computer for measurement of cross-sections is discussed and its performance is presented. An improved version of a field deployable comparator is also discussed. After implementing the aerial calibration procedure the analytical photogrammetric method using 1:3000 scale photography produces elevation values on targeted but withheld check points. The standard deviation of elevation discrepancies is 0.5 inches (14mm) corresponding to a proportional error of one part in 27,000. The cross-section device produces a standard deviation in plan of 0.003 inches (0.076mm) and provides a real time edit of observations in accordance with the criteria contained in the ROAD's program. The comparator development is only partially successful. Recommendations are made for improvement of the calibration procedure, the cross-section digitizer, the comparator and for implementation of results of this research. (FHWA)

  • Availability:
  • Corporate Authors:

    Ohio State University, Columbus

    Engineering Experiment Station, 2070 Neil Avenue
    Columbus, OH  United States  43210

    Ohio Department of Transportation

    25 South Front Street
    Columbus, OH  United States  43215
  • Authors:
    • Merchant, D C
  • Publication Date: 1980-5

Media Info

  • Pagination: n.p.

Subject/Index Terms

Filing Info

  • Accession Number: 00325038
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • ISBN: 304
  • Report/Paper Numbers: FHWA/OH-80/005 Final Rpt.
  • Contract Numbers: State Job 14324(0)
  • Created Date: Apr 15 1981 12:00AM