COMPARATIVE ACCURACIES OF FIELD AND PHOTOGRAMMETRIC SURVEYS

DATA RESULTING FROM THE EXAMINATION OF SURVEYS MADE BY PHOTOGRAMMETRIC AND BY CONVENTIONAL FIELD SURVEY METHODS FOR HIGHWAY DESIGN ARE COMPARED. THE GREATER PART OF THE DATA PRESENTED COMPARES THE ACCURACY OF ELEVATIONS ON ONE HIGHWAY SURVEY PROJECT FOR DESIGN OF A SECTION OF INTERSTATE HIGHWAY APPROXIMATELY 7 MI LONG. THE RESULTS OF ONE EVALUATION INDICATE THAT THE FREQUENCY AND MAGNITUDE OF DIFFERENCES BETWEEN TWO FIELD PARTIES ARE APPROXIMATELY THE SAME AS THOSE BETWEEN EITHER FIELD PARTY AND THE PHOTOGRAMMETRIC APPROACH. DATA FROM A LESS EXTENSIVE EXAMINATION OF THREE OTHER PROJECTS ARE ALSO ANALYZED AND COMPARED. BASIC FIELD SURVEY CONTROL IS NECESSARY FOR HORIZONTAL MEASUREMENTS MADE BY EITHER CONVENTIONAL FIELD OR PHOTOGRAMMETRIC SURVEYING METHODS. ASIDE FROM THIS, AND TO THE EXTENT HORIZONTAL MEASUREMENTS ARE SHOWN BY PLOTTED POSITIONS, PHOTOGRAMMETRIC METHODS RESULT IN BETTER LOCAL AND OVERALL HORIZONTAL ACCURACY. BOTH METHODS, HOWEVER, ARE ADEQUATE FOR THE PURPOSES OF HIGHWAY DESIGN AND CONSTRUCTION.

Media Info

  • Media Type: Print
  • Features: Figures; Tables;
  • Pagination: pp 49-58
  • Monograph Title: Photogrammetry and aerial surveys
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00202560
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Jun 23 1994 12:00AM