INFRARED IMAGERY APPLICATIONS IN DETERMINING HIGHWAY ENGINEERING DATA

THE OVERALL OBJECTIVE WAS TO DETERMINE THE FEASIBILITY OF AERIAL RECONNAISSANCE SURVEYING USING INFRARED IMAGERY TO DETERMINE SURFACE AND SUBSURFACE CONDITIONS IN A REMOTE SWAMP AREA. THE AREA SELECTED WAS IN THE DARIEN GAP SECTOR OF THE PROPOSED PAN AMERICAN HIGHWAY IN COLOMBIA. THE SWAMP EXTENDS SOUTHWARD ABOUT 100 MILES FROM THE BAY OF COLOMBIA, ALONG EACH SIDE OF THE RIO ATRATO, AND VARIES IN WIDTH FROM 20 TO 40 MILES IN THE NORTHERN HALF. THE SWAMP HAS RESULTED FROM GRADUAL DEPOSITION OF SEDIMENTS FROM THE ADJACENT HILLS INTO A MORE SOUTHERLY EXTENSION OF THE BAY OF COLOMBIA, AND HAS A DEVELOPMENT OF AN INTENSE GROWTH OF SWAMP VEGETATION. THE MORE SPECIFIC OBJECTIVES WERE TO' /1/ DETERMINE THE OPTIMUM ALTITUDE, TIME OF DAY, SPECTRAL REGION AND OTHER PARAMETERS IN TYPICAL SWAMP AREAS IN A FIRST PHASE; AND /2/ UTILIZING THE INFORMATION OBTAINED IN THE FIRST PHASE, OBTAIN INFRARED IMAGERY THAT WOULD BE USEFUL IN SELECTING A FEASIBLE ROUTE FOR THE HIGHWAY ACROSS THE SWAMP. IT WAS HOPED THAT INFORMATION WOULD BE OBTAINED ON DEPTH OF WATER, DEPTH TO A STABLE FOUNDATION STRATUM FOR EMBANKMENTS, AND CHARACTER OF THE SEDIMENTS, PARTICULARLY THE LOCATION OF GRANULAR MATERIALS. BASED ON FLIGHTS MADE OVER SELECTED, REPRESENTATIVE AREAS OF THE SWAMP, DURING THE DAYTIME AND AT NIGHT, IT WAS DETERMINED THAT THE SYSTEM BEING USED WAS NOT PRODUCING IMAGERY THAT WOULD BE SUITABLE FOR FURTHER HIGHWAY LOCATION STUDY, SO THE WORK WAS TERMINATED AT AN EARLY STAGE. BASED ON INSTRUMENT CHECK-OUT AFTER RETURN TO THE UNITED STATES THE CONTRACTER ATTRIBUTED THE OVERALL FAILURE TO OBTAIN SUITABLE IMAGERY TO' /1/ A MALFUNCTION IN THE VACUUM SYSTEM OF THE APPARATUS AND /2/ DAMAGE TO THE INFRARED DETECTOR IN SHIPMENT TO COLOMBIA. CONTRIBUTING TO THE LACK OF SUCCESS WERE THE ADVERSE ENVIRONMENTAL CONDITIONS, PARTICULARLY THE MINUTE THERMAL DIFFERENCES IN THE SWAMP. /BPR/

  • Supplemental Notes:
    • Admin, No 77111, NO CPR-11-2345, MAR65
  • Corporate Authors:

    HRB-Singer Incorporated

    P.O. Box 60, Science Park
    State College, PA  United States  16801
  • Authors:
    • Ory, T R
    • Balmer, H E
  • Publication Date: 1965-3

Subject/Index Terms

Filing Info

  • Accession Number: 00202564
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS
  • Created Date: Oct 1 1994 12:00AM