TOPOGRAPHIC MAPPING OF PATHS BETWEEN MICROWAVE TOWERS

THE COMPILATION OF TOPOGRAPHIC MAPS FOR USE BY WESTERN UNION IN PLACING TOWERS FOR ITS SYSTEM OF MICROWAVE TRANSMISSION IS SIMILAR TO THOSE OF RECONNAISSANCE SURVEY MAPPING TO DETERMINE FEASIBLE ROUTES FOR HIGHWAYS, ESPECIALLY WHERE DISTANCES OF 30 MILES OR MORE ARE INVOLVED. THE TECHNIQUE OF COMPILING TOPOGRAPHIC MAPS FOR MICROWAVE PATHS IS DESCRIBED. BEFORE AERIAL PHOTOGRAPHY FLIGHTS WERE MADE, THE TOWER SITES WERE LOCATED BY THE MICROWAVE ENGINEERS. AERIAL PHOTOGRAPHS WERE THEN TAKEN OF THE PATHSTRIP BETWEEN THESE POINTS. WITH THE COORDINATES KNOWN, THE MIDPOINT COORDINATES AND THE DISTANCE BETWEEN THE MICROWAVE STATIONS WERE COMPUTED. THE GEOGRAPHIC COORDINATES WERE CONVERTED TO THE STATE PLAN COORDINATE SYSTEM. TO CONTROL THESE STRIPS ADEQUATELY FOR COMPILATION OF THE TOPOGRAPHIC MAPS WITH A KELSH STEREOSCOPIC PLOTTER, THE HORIZONTAL CONTROL WAS OBTAINED FOR EACH MODEL BY A RADIAL LINE PLOT. THIS METHOD OF ESTABLISHING HORIZONTAL CONTROL FOR EACH STEREOSCOPIC MODEL ALLOWS ALL CONTROL POINTS REQUIRED IN THE MAP COMPILATION, BOTH HORIZONTAL AND VERTICAL, TO BE ESTABLISHED FOR THE MICROWAVE CORRIDOR OR PATH THROUGH UTILIZATION OF AN ADEQUATE DISTRIBUTION OF THE WELL-DEFINED AND IDENTIFIABLE IMAGE POINTS, AS TRANSFERRED FROM THE ORIGINAL MAPS OF THE REGION. FOR HIGHWAY RECONNAISANCE SURVEY PURPOSES, THIS SYSTEM OF ESTABLISHING CONTROL FOR COMPILING SMALL-SCALE TOPOGRAPHIC MAPS CAN BE USED WITH THE INCURRANCE OF MINIMUM COST.

Media Info

  • Media Type: Print
  • Pagination: pp 2-3
  • Monograph Title: PHOTOGRAMMETRY AND AERIAL SURVEYS
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00202834
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 21 1970 12:00AM