PHOTOGRAMMETRY RESEARCH STUDY NO 1

THIS STUDY IS A TEST OF PHOTOGRAMMETRIC MAP AND SPOT ELEVATION ACCURACY AS PRODUCED WITH PROJECTION TYPE STEREOPLOTTERS UNDER CONTROLLED CONDITIONS. MAPS AT SCALES 1:600, 1:1200, AND 1:2400 ARE ANALYZED BY MEASUREMENT OF CONTOUR DEVIATIONS. SPOT ELEVATION READINGS AT THESE SCALES WERE TAKEN FROM A GROUND SURVEYED GRID AREA WHICH CONTAINED 651 POINTS OF KNOWN GROUND ELEVATION. THE DATA DEVELOPED FOR EACH TEST INCLUDE THE ARITHMETIC MEAAN, STANDARD DEVIATION, AND CALCULATED C-FACTOR. THE DOUBLE-PROJECTION DIRECT- VIEWING STEREOPLOTTERS USED IN THE STUDY WERE EQUIPPED WITH STEREO IMAGE ALTERNATORS AND WERE BY TWO DIFFERENT MANUFACTURES. THE RESULTS OF ALL STATISTICAL DATA INCLUDING MAP ANALYSIS AND SPOT ELEVATION ROADINGS AT THE VARIOUS SCALES SHOW AN AVERAGE CALCULATED C-FACTOR OF 1935. A LIMITED STUDY IS INCLUDED WHICH COMPARES THE DIFFERENCES BETWEEN THE COMPUTED COORDINATES OF GROUND CONTROL STATIONS AS ACHIEVED BY FOUR DIFFERENT SURVEY METHODS--TRAVERSE, TRIANGULATION, TRILATERATION AND POLAR. /AUTHOR/

  • Supplemental Notes:
    • 510, 10
  • Corporate Authors:

    Wyoming State Highway Department

    ,    

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00202580
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Aug 8 1971 12:00AM