SEMI-CONTROLLED AERIAL PHOTOGRAPHS AS A RIGHT-OF-WAY SURVEYING TOOL

TO USE AERIAL PHOTOGRAPHS AS A SATISFACTORY SURVEYING TOOL AND MAP SUBSTITUTE, IT IS NECESSARY THAT THE PHOTOGRAPHS BE ENLARGED PRECISELY. TO OBTAIN PRECISE PHOTOGRAPHIC ENLARGEMENTS, ADEQUATE TARGETS MUST BE SET ON THE GROUND BEFORE PHOTOGRAPHY, WITHIN THE AREA TO BE PHOTOGRAPHED, TO OBTAIN BOTH AN ENLARGEMENT FACTOR AND SCALING FACTORS. IT HAS BEEN EXPERIENCED IN WORKING WITH AERIAL PHOTOGRAPHS ENLARGED TO A SCALE OF 20 FEET TO 1 INCH THAT THE DETERMINATION OF THE DIMENSIONS OF AREAS, SUCH AS FRONTAGE ROADS, THAT ARE TO BE CONVEYED TO OTHER POLITICAL SUBDIVISIONS SAVES A GREAT DEAL OF OFFICE AND SURVEY TIME. THE RESULTS OBTAINED WERE AS ACCURATE AS THOSE NORMALLY OBTAINED BY CONVENTIONAL SURVEY METHODS ON THE GROUND. PLANIMETRY CAN BE LOCATED WITH SUFFICIENT PRECISION FOR MOST OF THE WORK TO BE ACCEPTABLE. THIS CAN BE DONE AT A LOWER COST, COVERING A GREATER AREA, AND WITH BETTER DETAILED COVERAGE, THAN BY CONVENTIONAL SURVEY METHODS. THE MERIT OF USING SEMI-CONTROLLED AERIAL PHOTOGRAPHS LIES IN THE FACT THAT THE METHOD IS FAST AND INEXPENSIVE, AND HAS ACCEPTABLE ACCURACY AS COMPARED WITH CONVENTIONAL SURVEY METHODS. IN ADDITION, THE NUMBER OF MISTAKES OR ERRORS IS REDUCED AND THESE ERRORS ARE READILY ISOLATED. /AUTHOR/

  • Record URL:
  • Supplemental Notes:
    • Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
  • Authors:
    • Hovde, Erwin D
  • Conference:
  • Publication Date: 1962

Media Info

  • Media Type: Digital/other
  • Features: Figures;
  • Pagination: pp 51-60
  • Monograph Title: Highway aerial surveys - controls and rights-of-way 1962
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00202644
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Jun 3 1994 12:00AM