DEVELOPMENT OF DRAINAGE MAPS FROM AERIAL PHOTOGRAPHS

THERE HAS BEEN A GROWING NEED FOR DETAILED DRAINAGE MAPS FOR USE IN THE LOCATION, DESIGN, AND CONSTRUCTION OF HIGHWAY, AIRPORT AND FLOOD CONTROL PROJECTS. SUCH MAPS CAN BE USED BY BOTH TECHNICALLY TRAINED AND UNTRAINED PERSONNEL. AIRPHOTOS CAN BE EMPLOYED IN THE CONSTRUCTION OF DETAILED DRAINAGE MAPS. THE AIRPHOTOS USED FOR THIS WORK WERE TAKEN IN 1937-1943 IN CONNECTION WITH THE UNITED STATES DEPARTMENT OF AGRICULTURE MAP PROGRAM. COUNTIES WERE COVERED BY A SERIES OF NORTH-SOUTH FLIGHT STRIPS WHICH OVERLAPPED ABOUT TWENTY PERCENT. THE AIRPHOTO PRINTS OF THE COUNTIES WERE PURCHASED FROM THE AGRICULTURE ADJUSTMENT ADMINISTRATION OF THE UNITED STATES DEPARTMENT OF AGRICULTURE ALONG WITH PHOTOGRAHS OF UNCONTROLLED MOSAICS KNOWN AS THE COUNTY INDEX SHEETS. IN ORDER TO TRANSLATE THE INFORMATION AVAILABLE IN AIRPHOTOS INTO USEFUL DATA FOR ENGINEERING PURPOSES IN THE FORM OF DETAILED DRAINAGE MAPS, IT IS NECESSARY TO CORRELATE "PATTERNS" OBSERVED IN THE AIRPHOTOS WITH BASIC DRAINAGE PRINCIPLES GLEANED FROM THE STUDY OF THE NATURAL SCIENCES OF PEDOLOGY, GEOLOGY, PHYSIOGRAPHY, GEOMORPHOLOGY, AND OTHERS. AS A RESULT OF SUCH A CORRELATION, IT HAS BEEN POSSIBLE TO CONSTRUCT ACCURATE DRAINAGE MAPS IN A REASONABLY SHORT PERIOD. SUCH MAPS CANNOT BE DUPLICATED BY ANY OTHER KNOWN METHOD AT A COST COMPARABLE IN TIME AND MONEY. SINCE THERE ARE NO ACCURATE BASE MAPS AVAILABLE FOR INDIANA, ONE OF THE IMPORTANT DEVELOPMENTS IN THE STUDY IS THAT OF TRANSFERRING DATA FROM LARGE-SCALE AIRPHOTO PRINTS TO THE ONLY AVAILABLE SMALL-SCALE COUNTY BASE MAPS. INACCURACIES IN THE METHOD OF TRANSFER WERE FOUND TO BE SMALL AND RELATIVE IN CHARACTER. VARIATIONS IN THE DISTANCES BETWEEN SECTION CORNERS AND THE LOCATIONS OF THE SECTION CORNERS THEMSELVES, AS RECORDED ON THE ORIGINAL BASE MAPS, NECESSITATED SCALE ADJUSTMENTS IN FITTING THE AIRPHOTO IMAGES TO THE BASE MAPS. THE COMPLETED MAPS NOT ONLY SHOW THE MAJOR STREAMS AND THEIR PRINCIPAL TRIBUTARIES, BUT INDICATE THE COURSES OF THE DRAINAGE WAYS FROM THEIR BEGINNINGS AS FIELD GULLIES AT THE WATERSHED DIVIDES. SUCH MAPS HAVE APPLICATION IN OBTAINING DRAINAGE AREAS FOR USE IN COUNTY AND STATE HIGHWAY CONSTRUCTION, IN AIRPORT CONSTRUCTION, AND IN FLOOD CONTROL PROJECTS. /AUTHOR/

  • Supplemental Notes:
    • Vol 26, pp 150-163, 20 FIG, 1 TAB
  • Authors:
    • Parvis, M
  • Publication Date: 1947

Media Info

  • Monograph Title: Proceedings of the Twenty-Sixth Annual Meeting of the Highway Research Board Held at Washington, D.C. December 5-8, 1946
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00204359
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: May 29 1972 12:00AM