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The Recent Timber Harvest Map
represents the percent of recent timber harvest in forested regions. When
more than 320 contiguous acres were cut the areas were mapped separately
and are labeled as 100% cut. When the cutting was more patchy the areas
were mapped according to their dominant overstory vegetation and given an
additional classification of high, medium, low or incidental recent timber
harvest. The high cutting classification is given to areas with greater
than 66% of the area cut, medium cutting has between 33% and 66% cut, and
low cutting has less than 33% cut. Non-Timber areas includes
classifications such as, Lava Fields, Urban / Industrial, Agricultural
Cropland / Pastureland, and Alpine Communities.
The Recent Timber Harvest Map
represents actual vegetation recorded by LANDSAT imagery taken primarily
in July of 1988. Current vegetation patterns may be slightly different due
to vegetation’s successional stages and recent timber harvest. The
nominal minimum mapping unit was 320 acres, although most mapped areas are
larger
The data for the Recent
Timber Harvest Map was taken from the Oregon Gap Analysis Program directed
by the Idaho Cooperative Fish & Wildlife Research Unit, University of
Idaho, in cooperation with the Oregon Department of Fish and Wildlife and
the Oregon Natural Heritage Program. The data and more detailed
descriptions can be found at Oregon
Geospatial Data Clearinghouse under Vegetation/species Idaho F&W
Gap Vegetation - 1:250,000.
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