LAC 43:XXVII.705. Scale of Aerial Photography Negatives

A. The altitude above average natural ground elevation for all aerial photography shall be such that the photographic negatives produced for each respective area classification shall conform to the minimum scale requirements specified within these standards. B. Aerial photography for planimetric maps which are developed to depict horizontal features only may be flown at higher (more compressed) negative scale altitudes to reduce cost. C. Aerial photography for topographic maps which are developed to depict both horizontal and vertical features must be flown at lower (more expanded) negative scale altitudes to facilitate accurate compilation. D. The following schedules specify the minimum required photographic negative scales for each respective area classification based upon the type of mapping (planimetric or topographic) to be developed. The negative scales shown are subject to enlargement based upon specific project requirements. Any negatives deviating by more than 5 percent of the final project scale specified shall be rejected. Schedule 1 Photographic Negative Scales Planimetric Mapping Area Classification | Map Scale | Photo Scale A | 1" = 50' | 1" = 400' B | 1" = 100' | 1" = 800' C | 1" = 200' | 1" = 1600' D | 1" = 400' | 1" = 3200' Schedule 2 Photographic Negative Scales Topographic Mapping Area Classification | Map Scale | Contour Interval | Photo Scale A | 1" = 50' | 1' | 1" = 200' B | 1" = 100' | 1' | 1" = 400' B | 1" = 100' | 2' | 1" = 800' C | 1" = 200' | 2' | 1" = 800' C | 1" = 200' | 5' | 1" = 1600' D | 1" = 400' | 10' | 1" = 3200'