00202610

Component

http://onlinepubs.trb.org...s/hrr/1966/142/142-006.pdf

IN LARGE SCALE PHOTOGRAMMETRIC PLOTTING, PARTICULARLY IN THE FIELD OF HIGHWAYS, THE KELSH PLOTTER IS ONE OF THE MOST COMMONLY USED INSTRUMENTS IN NORTH AMERICA. AT PRESENT A SIGNIFICANT AMOUNT OF WORK TIME IS STILL BEING SPENT ON MODEL ORIENTATION. ONE DISADVANTAGE IN PRESENT TRIAL-AND- ERROR PROCEDURES IS THE NECESSITY OF REPEATING THE ORIENTATION PROCEDURES FOR RELATIVE AND ABSOLUTE ORIENTATION A NUMBER OF TIMES BEFORE Y-PARALLAXES ARE REMOVED AND BEFORE SCALE AND ELEVATION DIFFERENCES ARE ELIMINATED BETWEEN MODEL AND CONTROL POINTS. SUGGESTIONS FOR APPLYING NUMERICAL ORIENTATION TO KELSH PLOTTERS WITHOUT MODIFICATION OF THE INSTRUMENTS ARE GIVEN. SUCH NUMERICAL ORIENTATION CAN BE APPLIED TO RELATIVE ORIENTATION ACCORDING TO MEASURED PARALLAXES, TO ABSOLUTE ORIENTATION ACCORDING TO CONTROL POINTS, AND TO SETTING OF PRECOMPUTED ORIENTATION ELEMENTS, DETERMINED FROM INSTRUMENTAL OR ANALYTICAL AERIAL TRIANGULATION. THE LATTER TWO APPLICATIONS WILL BE MOST ECONOMICALLY SIGNIFICANT, WHILE THE FIRST WILL BE OF INTEREST IN AREAS WHERE TRIAL-AND-ERROR RELATIVE ORIENTATION HAS A SLOW RATE OF CONVERGENCE, SUCH AS HILLY TERRAIN.

Paper sponsored by Committee on Photogrammetry and Aerial Surveys. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

01485990

pp 47-54

1966

Highway Research Record

Digital/other

Figures (4) ; References (5)

Aerial photography; Measurement; Methodology; Numerical analysis; Triangulation

Orientation

Design; Highways

TRIS, TRB

Nov 18 1994 12:00AM

• AERIAL INFRARED SURVEYS: A HIGHWAY RESEARCH TOOL
• AERIAL PHOTOGRAPHY IN THE UNIFIED INFORMATION SYSTEM
• AUTOMATION IN MAP DATA COLLECTION FOR ENGINEERING COMPUTER PROGRAMS
• THE ANNOTATED PHOTOMAP FOR HIGHWAY PLANNING IN CONGESTED SUBURBAN AREAS
• THE PHOTOGRAMMETRIC METHOD AS A MEANS OF PROVIDING HIGHWAY ENGINEERS WITH AN INTEGRATED AND COMPLETE SYSTEM OF SURVEYING
• TRAFFIC FLOW INVESTIGATIONS BY PHOTOGRAMMETRIC TECHNIQUES