Some essential points relating to precision and accuracy (distinction between precision and accuracy, correct evaluation of accuracy) are reviewed; then, based on experimental results from several sources, a quantitative study of the accuracy of analytical restitutions in the case of the photo-pair is presented. The principal themes are the following: The effect of measurement redundance upon the accuracy (repetition of the settings, use of several neighboring targets to define an object point, and use of several frames at each station can on an average increase the accuracy by 50 per cent, whatever be the base-to-mean-object-distance ratio, the maximal accuracy for a certain kind of photogrammetric system has been found to correspond to a measurement equivalent normal law with a 1.2 micrometers standard deviation (which is the RMS bias of the measurements) and the minimum accuracy to a normal law with a 2.5 micrometers standard deviation); The effect of the geometrical characteristics of the system (base-to-object-distance ratio, camera asis convergence, and number and disposition of the control points); Accuracy prediction (two predictors are presented; the Karara/Abdel Aziz predictor, which reduces the problem to the central point of the object volume, and a predictor obtained from simulation. These predictors are correct on the condition that a good estimation of the standard deviation of the equivalent normal law of the comparator observation of the system (camera plus comparator) is employed; and Non-metric camera accuracy (for the best of them, it seems to be the same as for metric cameras).

  • Availability:
  • Corporate Authors:

    American Society of Photogrammetry

    105 North Virginia Avenue
    Falls Church, VA  United States  22046
  • Authors:
    • Hottier, P H
  • Publication Date: 1976-3

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: p. 345-375
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00135049
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 11 1976 12:00AM