Louisiana Administrative Code
Title 43 - NATURAL RESOURCES
Part XXVII - State Lands
Subpart 1 - Land Information Mapping and Map Records System
Chapter 15 - Geographic Base Map
Section XXVII-1523 - Photo Atlas Sheets
Current through Register Vol. 50, No. 9, September 20, 2024
A. In order to verify base map compilation and facilitate subsequent parcel map preparation, rectified vertical aerial photographic negative and positive photo atlas sheets shall be produced for each scale of planimetric or topographic base maps to be developed. Photo atlas sheets will be positioned so that each 1" = 50', 1" = 100', 1" = 200' or 1" = 400' base map plot will have a corresponding photo atlas sheet of the same scale, size and orientation as the companion base map. The total sheet size will be 28 inches high by 30 inches wide and will be printed within the same border area as the companion base map imagery. The photo image area of each sheet will be 25 inches by 25 inches and will extend past the edges of the base map plots by 1 inch, which results in a 2-inch overlap between adjacent photo atlas sheets. All photo atlas sheets will be properly rectified so that the edge match between the base map plot and the corresponding photo atlas sheet will be within 1 percent of the total sheet distance (i.e., the match borders will not be off by more that 0.25 inches). A typical photo atlas sheet layout is included within §1535, Appendix E.
B. All rectified aerial photo atlas sheets shall be made directly from the aerial photography negatives. The rectified positives shall have fine grain quality and uniform density, shall preserve the clarity and detail of the original negatives to the maximum extent possible, and shall be free of dust, marks, scratches, fog, streaks, stains and blemishes of any kind. The photo atlas sheets may be screened or unscreened at the discretion of the responsible contracting authority.
C. One set of photo atlas sheets shall be provided on dimensionally stable double-matted 4 mil film material formatted to each companion base map sheet. All sheets will be printed with the right reading side opposite the emulsion side. Each sheet shall have grid ticks which appear as 1/2 inch (0.50") long black intersecting lines on the final imagery at 5-inch intervals.
AUTHORITY NOTE: Promulgated in accordance with R.S. 50:171.
