PROGRESS IN REMOTE SENSING AND ITS APPLICATION TO HIGHWAY ENGINEERING AND RESEARCH

THE USE OF AIRBORNE REMOTE SENSORS IN AERIAL SURVEYS ARE DISCUSSED. TOPOGRAPHIC, GEOLOGIC, HYDROLOGIC, AND SOILS MAPS USED IN HIGHWAY ENGINEERING ARE PREPARED AT LEAST IN PART FROM AERIAL PHOTOGRAPHS. IMAGING AND NONIMAGING SENSORS ARE DESCRIBED AND DISCUSSED. IMAGING SENSORS PRODUCE TWO-DIMENSIONAL MAP-LIKE REPRESENTATIONS OF VARIATIONS IN THE RADIATION WITHIN THE FIELD OF VIEW OF THE SENSOR. CAMERAS, OPTICAL-ELECTROMECHANICAL SCANNERS, PASSIVE-MICROWAVE SCANNERS, AND RADAR ARE IN THIS GROUP. THE DATA PRODUCED BY THESE SENSORS ARE USUALLY RECORDED ON PHOTOGRAPHIC FILM, EITHER THROUGH DIRECT IMAGING OR THROUGH PHOTOGRAPHING THE OUTPUT OF A CATHODE RAY TUBE OR CRATER LAMP. NONIMAGING SENSORS PRODUCE ESSENTIALLY ONE-DIMENSIONAL RECORDS OF RADIATION RECEIVED FROM POINTS ALONG THE FLIGHT PATH OF AN AIRCRAFT. GAMMA-RAY SPECTROMETERS, INFRARED AND MICROWAVE RADIOMETERS, LASER AND MICROWAVE PROFILERS, RADIO-FREQUENCY SOUNDING DEVICES, AND INDUCTION DEVICES FALL WITHIN THIS GROUP. THE DATA PRODUCED BY THESE SENSORS ARE RECORDED ON CHART PAPER. THE SURVEY INDICATES THAT SAVINGS RESULT WHEN AERIAL PHOTOGRAPHIC SURVEYS ARE USED IN HIGHWAY ENGINEERING. IT IS FELT THAT IN THE NEAR FUTURE IT WILL BE POSSIBLE TO ECONOMICALLY EXPLOIT THE SPECIAL PROBLEM-SOLVING POTENTIAL OF SOME OF THESE SENSORS.

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 38-48
  • Monograph Title: Remote sensing and its application to highway engineering
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00202773
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Jul 28 1994 12:00AM