00202834

Component

https://onlinepubs.trb.or...inepubs/sr/sr82/82-002.pdf

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.

pp 2-3. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

00202562

pp 2-3

1964

Highway Research Board Special Report

Digital/other

Aerial photography; Data plotters; Economics; Highways; Location; Microwave communication systems; Reconnaissance; Topographic maps; Towers

Highway location

Design; Economics; Highways

TRIS, TRB

Sep 21 1970 12:00AM

• AERIAL SURVEYS AND USES OF PHOTOGRAMMETRY FOR HIGHWAYS
• Current Highway Applications of Photogrammetry and Aerial Surveys
• CURRENT PHOTOGRAMMETRIC PRACTICES IN VIRGINIA
• FUNCTION AND TECHNIQUES OF THE PHOTOGRAMMETRY SECTION, KANSAS STATE HIGHWAY COMMISSION
• FUNCTION AND TECHNIQUES OF THE PHOTOGRAMMETRY SECTION, TEXAS HIGHWAY DEPARTMENT
• MICHIGAN STATE HIGHWAY DEPARTMENT PHOTOGRAMMETRIC ACTIVITIES
• PHOTOGRAMMETRIC ACTIVITIES OF THE PENNSYLVANIA DEPARTMENT OF HIGHWAYS
• PHOTOGRAMMETRY AND HIGHWAYS
• PHOTOGRAMMETRY AS APPLIED BY FEDERAL HIGHWAY PROJECTS OFFICE REGION 9, U.S. BUREAU OF PUBLIC ROADS
• PHOTOGRAMMETRY IN ARIZONA HIGHWAY DEPARTMENT
• PHOTOGRAMMETRY IN MISSISSIPPI
• STANDARD SIZE PLAN SHEETS PREPARED FROM CONTROLLED AERIAL PHOTOGRAPHS IN GEORGIA
• USE OF AERIAL PHOTOGRAPHY IN REGION 15, U.S. BUREAU OF PUBLIC ROADS
• USE OF AERIAL SURVEYS IN CONNECTICUT
• USE OF AERIAL SURVEYS IN REGION 8, U.S. BUREAU OF PUBLIC ROADS
• USE OF PHOTOGRAMMETRY IN MONTANA
• USE OF THE PHOTOGRAMMETRIC AND ELECTRONIC PROCESSES BY THE INDIANA STATE HIGHWAY COMMISSION
• USES OF PHOTOGRAMMETRY BY THE WISCONSIN STATE HIGHWAY COMMISSION