Start Date

4-1980 8:00 AM

Description

In 1978, succeeding photographic flights were flown over a citrus grove in Polk County, Florida, during winter, spring, and summer seasons using Aerochrome color infrared film. The spring season flight gave the best separation between healthy and stressed trees. The best scale for photo interpretation and use of inexpensive analysis equipment was 1 inch = 330 feet. Photographs taken with a 12-inch focal length lens were far superior than those taken with a 6-inch lens. A cell-unit system was developed for tree registration. The system was used with window-overlays for rapid photo interpretation and a black and white enlargement for ground verification. Use of the enlargement in ground surveys reduced the survey time from 25 to 2.5 hours. The cell-unit grid system was compatible with computer processing for rapid recording of photo interpreted data, storage, retrieval, and analysis. A mapping system with 99 percent accuracy was developed for the fast surveillance of tree vigor and stress.

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Apr 1st, 8:00 AM

Aerial Color Infrared Photography Applications to CitricuJture

In 1978, succeeding photographic flights were flown over a citrus grove in Polk County, Florida, during winter, spring, and summer seasons using Aerochrome color infrared film. The spring season flight gave the best separation between healthy and stressed trees. The best scale for photo interpretation and use of inexpensive analysis equipment was 1 inch = 330 feet. Photographs taken with a 12-inch focal length lens were far superior than those taken with a 6-inch lens. A cell-unit system was developed for tree registration. The system was used with window-overlays for rapid photo interpretation and a black and white enlargement for ground verification. Use of the enlargement in ground surveys reduced the survey time from 25 to 2.5 hours. The cell-unit grid system was compatible with computer processing for rapid recording of photo interpreted data, storage, retrieval, and analysis. A mapping system with 99 percent accuracy was developed for the fast surveillance of tree vigor and stress.

 

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