Seasonal Change Revealed by Time-Lapse Photography
ARMY NATICK LABS MA EARTH SCIENCES LAB
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The report demonstrates the application of time-lapse photographic techniques to a study of seasonal changes in coloration and appearance at sixteen locations in New England. The sites used to illustrate the method were selected for their representativeness of the four major physiographic regions coastal lowland, uplands, interior lowlands, and mountains. Individual landscapes were photographed in color during each season, recording the identical field-of-view from the same spot locations. The photography is supplemented by topographic, vegetation, and climatic maps, graphs, site data, and narrative descriptions. Factors pertaining to camouflage problems are documented photographically to illustrate significant changes in vegetation color. The combination of maximum visibility and minimum canopy coverage during periods of vegetation dormancy in forested areas is contrasted with greatly reduced visibility and nearly complete canopy coverage during the growing season. Trafficability problems in off-road areas are strikingly evident in scenes depicting winter snow accumulation and seasonal flooding in spring.