from: Montana GAP Analysis, Montana Land Cover Atlas, by Foster B. Fisher, Chris Winne, Michele M. Thornton, Troy P. Tady, Zhenkui Ma, Melissa M. Hart, and Roland L. Redmond. Septemter 30, 1998.
I. Urban and Agricultural Lands -- Select Item -- 1100 Urban or Developed Lands 2010 Agricultural Lands - Dry 2020 Agricultural Lands - Irrigated
II. Grasslands herbaceous cover > 15%, shrub cover < 15%, and forest cover < 10% -- Select Item -- 3110 Altered Herbaceous 3130 Very Low Cover Grasslands 3150 Low / Moderate Cover Grasslands 3170 Moderate / High Cover Grasslands 3180 Montane Parklands & Subalpine Meadows
III. Shrublands shrub cover (SC) > 15% and forest cover < 10%; except 3500 classes where SC = HC -- Select Item -- 3200 Mixed Mesic Shrubs 3300 Mixed Xeric Shrubs 3309 Silver Sage 3310 Salt-Desert Shrub / Dry Salt Flats 3350 Sagebrush 3510 Mesic Shrub - Grassland Associations 3520 Xeric Shrub - Grassland Associations
IV. Forest Lands forest cover > 10% -- Select Item -- 4000 Low Density Xeric Forest 4140 Mixed Broadleaf Forest 4203 Lodgepole Pine 4205 Limber Pine 4206 Ponderosa Pine 4207 Grand Fir 4210 Western Red Cedar 4211 Western Hemlock 4212 Douglas-fir 4214 Rocky Mountain Juniper 4215 Western Larch 4216 Utah Juniper 4223 Douglas-fir / Lodgepole Pine 4260 Mixed Whitebark Pine Forest 4270 Mixed Subalpine Forest 4280 Mixed Mesic Forest 4290 Mixed Xeric Forest 4300 Mixed Broadleaf & Conifer Forest 4400 Standing Burnt Forest
V. Water -- Select Item -- 5000 Water
VI. Riparian Types sites clearly associated with riparian areas or woody draws -- Select Item -- 6110 Conifer Riparian 6120 Broadleaf Riparian 6130 Mixed Broadleaf & Conifer Riparian 6200 Graminoid & Forb Riparian 6300 Shrub Riparian 6400 Mixed Riparian
VII. Barren Lands sites with forest cover < 10%, shrub cover < 10%, and herbaceous cover < 10% -- Select Item -- 7300 Rock 7500 Mines, Quarries, Gravel Pits 7600 Badlands 7604 Missouri Breaks 7800 Mixed Barren Sites
VIII. Alpine vegetated sites above treeline -- Select Item -- 8100 Alpine Meadows
IX. Perennial Snow and Ice -- Select Item -- 9100 Snowfields or Ice
X. Other -- Select Item -- 9800 Clouds 9900 Cloud Shadows