La. Admin. Code tit. 43 § XXVII-1121

Current through Register Vol. 50, No. 12, December 20, 2024

Section XXVII-1121 - Aerial Triangulation Report

A. Immediately following completion of all aerial triangulation work or sub-block portions thereof, the contractor shall prepare a formal aerial triangulation report for submission to and approval by the responsible contracting authority. This report will include but not necessarily be limited to the following.

1. Photo index overlays:

a. flight line and exposure stations;

b. all control points and checkpoints used, appropriately labeled with station designations, computer designations (if different), agency responsible for establishing the stations, orders of accuracy, and an indication of whether individual points were targeted or photo identifiable;

c. all misclosures (DX, DY, DZ) at ground control and check points appropriately labeled with station designations;

d. note that overlays §1121. A.1 a, b, and c above may be combined all onto one single overlay at the contractor's option if the resultant product is clear and legible. Misclosures in DX and DY may be symbolized as vectors to some appropriate scale if the contractor so chooses.

2. Aerotriangulation results:

a. tabulation of all misclosures at ground control points used in the solution;

b. computed coordinates of all control points, passpoints and checkpoints;

c. computed coordinates of all resected camera stations with their orientations;

d. comparator coordinates of all points measured (including fiducials) sorted or arranged by individual frame. Plate-centered coordinates may be substituted for comparator coordinates if the contractor so chooses;

e. post adjustment plate residuals of all image coordinates used in the solution;

f. coordinates of LSR origin used for solution;

g. comparator calibration coefficients if comparator coordinates are furnished instead of plate-centered coordinates;

h. variance-covariance matrices of all triangulated positions and altitudes if an error propagation analysis was performed on the adjustment solution.

3. Narrative. The report shall include a brief narrative trying together §1121. A.1 and 2, and including descriptions of laboratory equipment, procedures and computer programs used. If comparator coordinates are furnished by the contractor, the comparator calibration correction equations shall be documented in the narrative to allow the responsible contracting authority to evaluate the coefficients supplied as well as to compute plate coordinates. Root-Mean-Square (rms) error summaries will be given for bundle adjustment residuals of all control points. Furthermore, misfits encountered at control points that required corrective action shall be clearly described along with descriptions of corrective actions taken.

B.Section 1121. A.2 a-h shall be submitted on acceptable PC-DOS or MS-DOS formatted computer transfer media in ASCII file format subject to the discretion and approval of the responsible contracting authority.

La. Admin. Code tit. 43, § XXVII-1121

Promulgated by the Office of the Governor, Division of Administration, State Land Office, LR 17:968 (October 1991).

AUTHORITY NOTE: Promulgated in accordance with R.S. 50:171.