Louisiana Administrative Code
Title 43 - NATURAL RESOURCES
Part XXVII - State Lands
Subpart 1 - Land Information Mapping and Map Records System
Chapter 9 - Photo Laboratory Procedures
Section XXVII-909 - Aerial Photography Diapositives

A. The contractor shall furnish one set of film or glass diapositives for each scale and coloration of aerial photography flown for use during subsequent analytic aerial triangulation and map compilation.

B. All diapositives will be printed from original aerial negatives (not from duplicate negatives). All film diapositives shall be printed on cut sheets of KODAK 7-mil Estar Base film or approved equal with a printer having a flat platen. All glass diapositives shall be produced using KODAK Ultra Flat plates or approved equal. Outdated emulsions shall not be used.

C. The printing and processing of all diapositives including development, fixation, washing and drying must produce diapositives free from tears, scratches, abrasion, light fog, light streaks, static marks, finger marks, stains, spots or blemishes of any kind excepting those originating on the original negative. Extreme care will be exercised to prevent lint from collecting on both the original negatives and the diapositives. Furthermore, clean, lint-free cotton gloves shall be used whenever diapositives are handled for any purpose. The diapositives shall be individually stored in polycarbonate sleeves or similar material that has a coefficient of hardness less that the emulsion on the diapositive. To the extent permitted by the original aerial negatives, all diapositives will be clear and sharp in detail, have uniform tone and a degree of contrast permitting ground details to show clearly in dark-toned and high-light areas as well as in the middle tones between the dark and light, with particular emphasis on legibility in the shadows.