BTM Values

Description of Land Use Classification

Land based agricultural activities undifferentiated as to crop and Residential Agricultural Mixtures. MMU 15

Areas virtually devoid of trees at high elevations. MMU 15

Sub alpine Avalanche

Areas below the tree line that are devoid of forest growth primarily due to snow avalanches. Usually herb or shrub covered. MMU 30ha.

Rock barrens, badlands, sand and gravel flats, dunes and beaches where un vegetated surfaces predominate, except where these conditions occur in the alpine areas. MMU 30ha

Areas virtually devoid of trees due to fire within the past 20 years. Forest less than or equal to %15 cover. MMU 30

Salt water mud flats and inter tidal areas at the mouth of rivers and creeks where the vegetation is influenced by frequent flooding. (at least yearly) MMU 15ha

Forest greater than or equal to 140 years old and greater than 6 meters in height. MMU 50ha

Forest less than 140 years old and greater than 6m. MMU: 50ha

Glaciers and permanent snow. MMU 50ha

Timber harvesting within the past 20 years, or older if tree cover is less than %40 and under 6 meters in height. MMU 15ha

Areas where the practice of selective logging can be clearly interpreted on the Landsat TM image and TRIM aerial photography. MMU: 30ha

Land use now or previously used for the surface extraction of minerals or quarry materials. MMU 15ha

Unimproved pasture and grasslands based on cover rather than use. Cover includes drought tolerant grasses sedges and shrubs up to 6m in height and less than 35% forest cover. Sparse forest stands are included with their under story of drought tolerant shrubs. MMU: 30ha

Recreation activities

Land use for private or public outdoor recreational purposes. Ski resorts and golf courses are included. MMU 30ha

All compact settlements including built up areas of cities, towns and villages as well as isolated units away from settlements. All open spaces that form an integral part of the urban matrix are included. MMU 15ha

Wetlands including swamps, marshes, bogs or fens. MMU 15ha

Refers to rivers and lakes. MMU 15ha

Oceans and fjords. MMU 15ha

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1	Water
2	Agriculture	Land based agricultural activities undifferentiated as to crop and Residential Agricultural Mixtures. MMU 15
3	Alpine:	Areas virtually devoid of trees at high elevations. MMU 15
4	Sub alpine Avalanche	Areas below the tree line that are devoid of forest growth primarily due to snow avalanches. Usually herb or shrub covered. MMU 30ha.
5	Barren Surfaces	Rock barrens, badlands, sand and gravel flats, dunes and beaches where un vegetated surfaces predominate, except where these conditions occur in the alpine areas. MMU 30ha
6	Recently Burned	Areas virtually devoid of trees due to fire within the past 20 years. Forest less than or equal to %15 cover. MMU 30
7	Estuaries	Salt water mud flats and inter tidal areas at the mouth of rivers and creeks where the vegetation is influenced by frequent flooding. (at least yearly) MMU 15ha
8	Old Forest	Forest greater than or equal to 140 years old and greater than 6 meters in height. MMU 50ha
9	Young Forest	Forest less than 140 years old and greater than 6m. MMU: 50ha
10	Glaciers and snow	Glaciers and permanent snow. MMU 50ha
11	Recently logged	Timber harvesting within the past 20 years, or older if tree cover is less than %40 and under 6 meters in height. MMU 15ha
12	Selectively logged	Areas where the practice of selective logging can be clearly interpreted on the Landsat TM image and TRIM aerial photography. MMU: 30ha
13	Mining	Land use now or previously used for the surface extraction of minerals or quarry materials. MMU 15ha
14	Rangelands	Unimproved pasture and grasslands based on cover rather than use. Cover includes drought tolerant grasses sedges and shrubs up to 6m in height and less than 35% forest cover. Sparse forest stands are included with their under story of drought tolerant shrubs. MMU: 30ha
15	Recreation activities	Land use for private or public outdoor recreational purposes. Ski resorts and golf courses are included. MMU 30ha
16	Urban	All compact settlements including built up areas of cities, towns and villages as well as isolated units away from settlements. All open spaces that form an integral part of the urban matrix are included. MMU 15ha
17	Wetlands	Wetlands including swamps, marshes, bogs or fens. MMU 15ha
18	Fresh water	Refers to rivers and lakes. MMU 15ha
19	Salt water	Oceans and fjords. MMU 15ha