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Identifying Vegetation Patterns – Apgar Lookout

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Identifying vegetation patterns: visible in the 300-60°
photographs below (from Apgar Lookout) are distinct patterns in the vegetation along Howe
Ridge to the left of Lake McDonald. These patterns were created by a history of forest
fires periodically burning a patchwork area of forest, prompting new growth. In the
infrared photograph, these patterns are much more distinct, providing an excellent example
of the value of infrared photography.

Panchromatic & infrared black-and-white images from 1935 at Apgar Lookout in
Glacier National Park, MT, USA.

180-300° arc sector image, panchromatic

apgr224pan 72935.jpg (50627 bytes)

180-300° arc sector image, infrared

apgr259ir 72935.jpg (57207 bytes)

300-60° arc sector image, panchromatic

apgr225pan 72935.jpg (45833 bytes)

300-60° arc sector image, infrared

apgr244ir 72935.jpg (53635 bytes)

60-180° arc sector image, panchromatic

apgr226pan 72935.jpg (40076 bytes)

60-180° arc sector image, infrared

apgr245ir 72935.jpg (49953 bytes)

Photographs courtesy of Glacier National Park archives.