FROM MAP TO COMPUTER

A NEW METHOD OF OBTAINING DIGITAL TERRAIN DATA FOR EARTHWORK QUANTITY COMPUTATION IS PRESENTED. THE PROCEDURE IS BEING USED IN THE DESIGN OF A 200-MI SECTION OF INTERSTATE HIGHWAY ON NEW LOCATION. CROSS-SECTION DATA ARE REFERRED TO A CALCULATED CENTERLINE, WHICH IS DEVELOPED FROM A STUDY OF AERIAL PHOTOGRAPHS PRIOR TO MAP COMPILATION. THE METHOD PERMITS KEY PUNCHING FOR ELECTRONIC COMPUTERS DIRECTLY FROM MANUSCRIPTS PREPARED BY THE PHOTOGRAMMETRIC MAPPING CONTRACTORS. ALTHOUGH THE METHOD WAS DEVELOPED PRIMARILY FOR COMPARATIVELY FLAT TERRAIN IT HAS ALSO BEEN ADAPTED FOR USE IN TAKING DIGITAL DATA FROM CONTOURS OF TOPOGRAPHIC MAPS. TIME STUDIES WERE MADE AND COMPARATIVE COSTS DEVELOPED FOR THIS TECHNIQUE AND FOR OTHER METHODS OF TAKING DATA FROM CONTOURS. THESE COSTS WILL SERVE AS A GUIDE IN ESTIMATING THE PROBABLE VALUE OF AUTOMATION AS A CONNECTING LINK BETWEEN CONTOURS OF THE MAPS AND THE COMPUTER. COMPLETE AUTOMATION FROM PLOTTER TO COMPUTER BY RESETTING THE STEREOMODELS IS ALSO DISCUSSED BRIEFLY. /AUTHOR/

Media Info

  • Monograph Title: Photogrammetry: developments and applications, 1960
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00202684
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 3 1994 12:00AM