CURRENT PHOTOGRAMMETRIC PRACTICES IN VIRGINIA

EQUIPMENT USED BY VIRGINIA IN THE PHOTOGRAMMETRY AND PHOTOGRAPHIS LABORATORY ARE DESCRIBED. TOPOGRAPHIC MAPPING SERVES AS THE BASIS FOR SUBSEQUENT ROUTE LOCATION AND AS A MEANS FOR REPORTING ROUTE ALTERNATIVES AND MAKING RECOMMENDATIONS. ON SOME PROJECTS A TOPOGRAPHIC MAP IS COMPILED OF THE ENTIRE PROJECT, MEASURING AND DELINEATING THE CONTOURS ON 2-FOOT INTERVAL. RECENT PHOTOGRAMMETRIC METHODS WERE CONFINED TO MEASUREMENT OF CROSS-SECTIONS USING A BENSON-LEHNER TERRAIN DATA TRANSLATOR COUPLED TO A KELSH STEREOSCOPIC PLOTTER. THE CROSS-SECTION DATA IN DIGITAL FORM ARE PUNCHED DIRECTLY INTO CARDS. THE PLANE COORDINATE COMPUTED CENTER LINE OR BASE LINE IS PLOTTED ON STABLE BASE DRAFTING FILM USING THE ARISTO COORDINATOGRAPH AND THE TARGETED HORIZONTAL CONTROL POINTS. ACTUAL PHOTOGRAMMETRIC INSTRUMENTATION WORK IS ACCOMPLISHED BY MEANS OF AN ELECTRONIC DIGITAL MEASURING AND RECORDING SYSTEM. PHOTOGRAPHIC MOSAICS AND ENLARGEMENTS OF AERIAL PHOTOGRAPHS ARE UTILIZED IN MOST PHASES OF ROUTE LOCATION, TRAFFIC ANALYSIS, GEOLOGIC AND SOIL ANALYSIS, PREPARATION OF RIGHT-OF-WAY COST ESTIMATES, AND DRAINAGE STUDIES. PHOTOGRAMMETRY AND PHOTOGRAMMETRY UNITED WITH ELECTRONICS FOR MEASURING AND DIGITAL RECORDING OF SPECIFIC MEASUREMENTS PROVIDED THE MEANS FOR A GREATLY INCREASING ENGINEERING PRODUCTIVITY IN VIRGINIA.

Media Info

  • Media Type: Print
  • Features: Figures; Photos;
  • Pagination: pp 42-46
  • Monograph Title: PHOTOGRAMMETRY AND AERIAL SURVEYS
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00202850
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 21 1970 12:00AM