REMOTE SENSING APPLICATIONS TO NEAR SURFACE GEOLOGY

THE "STATE OF THE ART" IN REMOTE SENSING AS A TOOL FOR THE ANALYSIS OF SURFACE AND NEAR SURFACE GEOLOGICAL CHARACTERISTICS IS REVIEWED; THE TECHNICAL EQUIPMENT AND OPERATIONAL METHODS ARE DESCRIBED AND ILLUSTRATIVE APPLICATIONS ARE SUMMARIZED. PHOTOGRAPHIC TECHNIQUES IN THE VISIBLE AND NEAR INFRARED REGION AND THERMAL MAPPING TECHNIQUES ARE DISCUSSED. THE REGIONS OF THE THE STUDY REPORTED ON OUTLINES A METHOD OF APPROACH FOR VARIOUS FORMS OF REMOTE SENSING ARE ILLUSTRATED BY A CHART. PHOTOGRAPHIC DATA ARE USEFUL IN PATTERN RECOGNITION AND ANALYSIS INCLUDING QUALITATIVE TOPOGRAPHIC INFORMATION (SINCE THE PHOTOGRAPHY IS FLOWN WITH 60% FORWARD LAP BETWEEN FRAMES); AND COLOR COMPOSITION ANALYSIS FROM BOTH THE VISIBLE AND THE "FALSE COLOR INFRARED." IN ORDER TO SORT OUT THE COLOR CONTENT INFORMATION FROM THE TERRAIN, MULTIPLE CAMERAS, FILMS AND FILTER TYPES ARE USED SIMULTANEOUSLY IN COMBINATION. THE CAMERA THAT IS GENERALLY USED IS DESCRIBED. THE MOST FREQUENTLY USED COMBINATION IN A FOUR-CAMERA OPERATION, COMPRISES EKTACHROME (FALSE COLOR) INFRARED; BLACK AND WHITE IN INFRARED; AERIAL EKTACHROME; AND AERO COLOR (COLOR NEGATIVE). THE THERMAL MAPPING (INFRARED LINE SCANNING) IS CONDUCTED WITH ELECTRONIC THERMAL MAPPING EQUIPMENT. BY MEANS OF ROTATING OPTICS IN THE MAPPER IN THE AIRCRAFT SEQUENTIAL LINES ARE SCANNED ON THE TERRAIN IN A DIRECTION PERPENDICULAR TO THE FLIGHT PATH OF THE AIRCRAFT. THE SCANNING RATE IS HIGH ENOUGH TO OBTAIN CONTIGUOUS COVERAGE ALONG THE FLIGHT PATH. A SAMPLE OF THERMAL IMAGERY AND A SPECIAL APPROACH TO THERMAL MAPPING DATA PROCESSING IN WHICH THE THERMAL IMAGERY HAS BEEN CONTOURED IS PRESENTED. THESE TECHNIQUES PARTICULARLY THERMAL MAPPING AND SPECIALIZED FORMS OF PHOTOGRAPHY ARE WITHIN THE ECONOMIC REACH OF STUDY PROGRAMS COVERING A FEW SQUARE MILES OF AREA. IT IS A USEFUL TOOL FOR PRELIMINARY STUDIES OF THE SURFACE AND NEAR SURFACE GEOLOGY IN HIGHWAY CORRIDORS, INDUSTRIAL SITES AND SIMILAR LOCATIONS.

Media Info

  • Features: Figures;
  • Pagination: p. 69-81

Subject/Index Terms

Filing Info

  • Accession Number: 00230222
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 24 1973 12:00AM