Louisiana Administrative Code
Title 43 - NATURAL RESOURCES
Part XXVII - State Lands
Subpart 1 - Land Information Mapping and Map Records System
Chapter 11 - Aerial Triangulation
Section XXVII-1117 - Stereocomparator Requirements
Current through Register Vol. 50, No. 9, September 20, 2024
A. If a stereocomparator is used for aerial triangulation, all passpoints may be marked monoscopically with a WILD PUG or equipment of equal or better precision on only the central three points along the cross-flight axis of the photo. Strip tie points, checkpoints, drop points (if any) and control points shall be marked stereoscopically. The maximum diameter of the mark shall be 40 micrometers, with every effort made to use a mark of lesser diameter, emulsion permitting.
B. All ground control points, passpoints, drop points (if any) and four corner fiducials will be measured with a stereocomparator having a least count of no greater than 1 micrometer and a rms intrinsic accuracy (calibration applied) of no worse that 2 micrometers for each stage. Dove prisms shall be used in all four positions for each point measured in stereo. The only exception to this requirement will be applicable to points falling in side-laps which are not intended to be used as strip tie points. The comparator calibration coefficients shall be included in the aerial triangulation delivery for each stage of the instrument.
AUTHORITY NOTE: Promulgated in accordance with R.S. 50:171.
