ADJUSTMENT OF PHOTOGRAMMETRIC SURVEYS

TESTS OF PHOTOGRAMMETRIC MAPPING WERE CONDUCTED UNDER ACTUAL FIELD CONDITIONS ON THREE SECTIONS, TOTALING 10.7 MI. IN LENGTH, FROM THREE CONSTRUCTION PROJECTS. EARTHWORK QUANTITIES FOR DESIGN AND ADVERTISING THE CONSTRUCTION CONTRACTS WERE OBTAINED BY TAKING TERRAIN CROSS-SECTION NOTES FROM THE 2-FT INTERVAL CONTOUR MAPS. THE TERRAIN NOTES AND CORRESPONDING ROADBED NOTES WERE THEN PROCESSED BY ELECTRONIC COMPUTERS. FIELD CROSS-SECTIONS FOR DETERMINING PAY QUANTITIES OF ROADWAY EXCAVATION HAD BEEN TAKEN AS THE PROJECTS WERE SLOPE STAKED FOR CONSTRUCTION. DIFFERENCES WERE NOTED BETWEEN FIELD AND PHOTOGRAMMETRIC SURVEY QUANTITIES. IT IS CONCLUDED THAT ADJUSTMENT OF PHOTOGRAPHIC SURVEYS BY MEANS OF ACCURATE FIELD PROFILE WILL: (1) MATERIALLY REDUCE LARGE LOCALIZED ERRORS IN EARTHWORK QUANTITIES, AND (2) RESULT IN OVER-ALL QUANTITIES WHICH ARE WITHIN LIMITS GENERALLY CONSIDERED TOLERABLE FOR PURPOSES OF PAYMENT.

Media Info

  • Monograph Title: Photogrammetry: developments and applications, 1959
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00202713
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 9 1994 12:00AM