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USFS Logo Research Data Archive
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Grading standing birch sawtimber near Wasilla Alaska.
more info/bigger image
Collection: Pacific Northwest Research Station, Alaska Image Archive
Keywords: "grading" of wood and wood products
detection, recognition and assessment of injuries and defects
defects occurring before conversion
Location: Alaska; Wasilla
Description: Grading standing birch sawtimber near Wasilla Alaska.
Date: 9/13/1962

Stereo shot of birch logs (14") on log deck - note grade deductor.
more info/bigger image
Collection: Pacific Northwest Research Station, Alaska Image Archive
Keywords: "grading" of wood and wood products
detection, recognition and assessment of injuries and defects
defects occurring before conversion
knots
Location: Alaska
Description: Stereo shot of birch logs (14") on log deck - note grade deductor.
Date: 9/13/1962

Stereo shot of birch logs (9-14") on log deck - note grade defects.
more info/bigger image
Collection: Pacific Northwest Research Station, Alaska Image Archive
Keywords: "grading" of wood and wood products
detection, recognition and assessment of injuries and defects
defects occurring before conversion
Location: Alaska
Description: Stereo shot of birch logs (9-14") on log deck - note grade defects.
Date: 9/13/1962