EVALUATION OF CONTROL EXTENSION

RESEARCH WAS CONDUCTED TO EVALUATE AERIAL TRIANGULATION PROCEDURES SPECIFICALLY FOR THE LARGE-SCALE TOPOGRAPHIC MAPPING BEING CONDUCTED BY THE TEXAS STATE HIGHWAY DEPARTMENT. A COMUTATIONAL PROCEDURE WAS DEVELOPED FOR RELATIVE ORIENTATION OF A SERIES OF PHOTOGRAPHS (EACH PHOTOGRAPH BEING REFERENCED TO THE PRECEDING PHOTOGRAPH), WHICH IS ESSENTIALLY EXACT IN FORM. ALL ASPECTS OF INTERDEPENDENCY BETWEEN ELEMENTS OF RELAITVE ORIENTATION HAVE BEEN INCLUDED. VARIATION IN ELEVATION HAS BEEN INCLUDED IN THE RELATIVE ORIENTATION SINCE ELEVATION VARIATION WILL INFLUENCE THE RELATIVE ORIENTATION CALCULATIONS WHEN THE DATA TAKEN FROM A TILTED PHOTOGRAPH IS RECTIFIED TO AN EQUIVALENT VERTICAL. THIS ANALYTICAL RELATIVE ORIENTATION PROCEDURE MAY BE USED TO EVALUATE THE SIZE AND DISTRIBUTION OF ERRORS, AND THE AMOUNT AND SPACING OF CONTROL WITHOUT THE RESULTS REFLECTING COMPUTATIONAL TROUBLES. THE COMPLETE ANALYTICAL PROCEDURE MAY BE VERY EFFECTIVE AS AN AERIAL TRIANGULATION BRIDGING PROCESS AND SHOULD BE TESTED FOR ITS PRACTICAL APPLICATION.

• Supplemental Notes:
  • Rr 93-1 F, 64 PP, 11 FIG, 3 TAB, 44 REF, 2 APP
• Corporate Authors:

  University of Texas, Austin

  Center for Highway Research, 200 West 21st Street
  Austin, TX  United States  78712
• Authors:
  • Turpin, R D
  • Knowles, D R
  • Carroll, J S
• Publication Date: 1966-9

Subject/Index Terms

• TRT Terms: Aerial photography; Altitude; Calculation; Evaluation; Topographic maps; Triangulation
• Uncontrolled Terms: Computation; Elevation; Orientation
• Old TRIS Terms: Topographic mapping
• Subject Areas: Design; Highways;

Filing Info

• Accession Number: 00202754
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 4 1994 12:00AM