Analytic aerotriangulation: triplets and sub-blocks; including use of auxiliary data: Phase III: Final technical report
Survey Dept., School of Civil Engineering, Cornell University, 1965 - Photography - 129 pages
The feasibility of using triplets and sub-blocks as opposed to the conventional stereopairs is investigated. A procedure for triplet aerotriangulation consisting of: (1) triplet relative orientation; (2) triplet assembly; and (3) transformation to ground control has been developed, programmed and tested using FORTRAN language and proven suitable for a 10k computer. The program uses the coplanarity equation for the condition for relative orientation. Both fictitious and real photographic data were tested. Triplets are proven to be much stronger than conventional stereopairs for extending control. A procedure for ninephotograph sub-block aerotriangulation consisting of: (1) sub-block relative orientation and coordinate computation; (2) sub-block assembly for a pair of sub-blocks; and (3) transformation to ground control has been developed, programmed and tested using FORTRAN language with fictitious photography on a 32k electronic computer. The program is based on the colinearity equation and also will perform aerotriangulation of strips using triplets. It requires 60 percent side lap of strips and provides many advantages over a general block triangulation solution. Theoretical developments are presented which allow incorporation of auxiliary exposure station data in the sub-block relative orientation. (Author).
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analytic aerotriangulation Assembled Sub-Blocks G1,G2 auxiliary data cartesian coordinate system check points Clarke Spheroid coefficient matrix colinearity computer program conformal transformation converts coordinate computation coordinate system coordinates and rotations coplanarity covariance matrix developed END OF PHOTO exposure station coordinates exposure station data exposure station parameters fictitious data fictitious photography FORTRAN geocentric coordinates geocentric X,Y,Z ground control points ground point coordinates Horizon Camera identical with subroutine illustrated in Figure input data deck iterations latitude least squares adjustment linear longitude and elevation mean square errors method normal equations O-OOOT observation equations oo9e orientation and coordinate output pass points performed perturbed plate coordinates PHOTO CARD photograph plate coordinate residuals points common points per photo Program BLOCKA Program TRIO Pt.No radians reference ellipsoid Simulated Vertical Photography solution Spheroid of 1866 sub-block assembly sub-block coordinate sub-block relative orientation TRANS transformation to ground triangulation Triplet Tl triplets and sub-blocks