ANALYTICAL RECTIFICATION IN HIGHWAY ENGINEERING

DISTORTIONS IN NEAR VERTICAL AERIAL PHOTOGRAPHS CAUSED BY TILT CAN BE REMOVED BY RECTIFICATION. FOR CERTAIN PURPOSES, THE RECTIFIER CAN ALSO BE USED TO LESSEN THE AMOUNT OF DISTORTIONS CAUSED BY TOPOGRAPHY. THE PHOTOGRAMMETRY DIVISION OF THE DEPARTMENT OF HIGHWAYS OF ONTARIO SUPPLEMENTS LINE MAPS OF EXISTING AND PROPOSED HIGHWAY ROUTES WITH CONTROLLED MOSAICS COVERING THE SAME AREA. IT HAS BEEN PROPOSED THAT THE CONVENTIONAL PROCEDURE OF RECTIFICATION BE REPLACED BY ONE IN WHICH THE ELEMENTS OF RECTIFICATION WOULD BE DETERMINED ON THE COMPUTER. THE COMPUTER WOULD OUTPUT THEIR VALUES IN SUCH A FORM THAT AN OPERATOR COULD SIMPLY 'DIAL' THEM INTO THE RECTIFIER AND EXPOSE A RECTIFIED PHOTOGRAPH. THE NEED FOR THE TEMPLATES AND THE TIME CONSUMING TRIAL AND ERROR PROCEDURE WOULD BE ELIMINATED. FORMULAE FOR THE FIVE INPUT ELEMENTS OF RECTIFICATION FOR THE WILD E4 RECTIFIER HAVE BEEN DERIVED. IT IS CONCLUDED THAT THE METHOD OF ANALYTICAL RECTIFICATION IS MORE EFFICIENT IN TERMS OF MAN HOURS AND MACHINE TIME, AND RESULTS IN RECTIFIED PHOTOGRAPHS AT LEAST AS GOOD AS THOSE OBTAINED FROM CONVENTIONAL METHODS. /AUTHOR/

  • Supplemental Notes:
    • Rpt Rr 162, 20PP
  • Corporate Authors:

    Ontario Department of Highways

    1201 Wilson Avenue
    Toronto, Ontario M3M 1J8,   Canada 
  • Authors:
    • Wilson, K
    • Vlcek, J
  • Publication Date: 1970-6

Subject/Index Terms

Filing Info

  • Accession Number: 00202860
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 19 1970 12:00AM