COORDINATE SYSTEMS FOR SURVEYING AND MAPPING

NGS (NATIONAL GEODETIC SURVEY) IS PLANNING TO PERFORM A NEW ADJUSTMENT OF THE U.S. HORIZONTAL CONTROL NETWORK WITHIN THE NEXT TEN YEARS. THE PRIMARY REASONS FOR A NEW ADJUSTMENT ARE THREEFOLD: (1) THE ACCURACY IN SCALE AND ORIENTATION NEEDED TODAY COULD NOT BE OBTAINED WITH THE NUMBER OF BASE LINES AND AZIMUTHS AVAILABLE AT THE TIME OF THE NORTH AMERICAN 1927 DATUM ADJUSTMENT; (2) AS NEW SURVEYS WERE PERFORMED AND ADJUSTED TO THE BASIC 1927 NET, RESULTS WERE DISTORTED DUE TO PIECEMEAL ADJUSTMENTS; AND (3) DEMANDS FOR GREATER RELATIVE ACCURACIES BETWEEN STATIONS IN THE NET HAVE INCREASED RAPIDLY. WHEN THE NEW ADJUSTMENT IS COMPLETED, RECOMMENDATIONS HAVE BEEN MADE THAT A NEW NATIONAL GRID SYSTEM OF PLANE COORDINATES BE ADOPTED FOR THE U.S., AND THAT ALL PLANE COORDINATES BE DEFINED IN METRIC UNITS. BOT OF THESE RECOMMENDATIONS HAVE MERIT AND THE PRIMARY OBJECTIVE OF THIS REPORT IS TO DISCUSS A NATIONAL GRID SYSTEM BASED ON A TRANSVERSE MERCATOR PROJECTION. /AUTHOR/

  • Authors:
    • Meade, B K
  • Publication Date: 1973-9

Media Info

  • Features: Figures; Tables;
  • Pagination: p. 337-42
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00203035
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 16 1974 12:00AM