Vegetation Classification and Mapping Project Report - USGS

B20 Black Grama - Galleta Herbaceous Vegetation
Location: Black Grama - Galleta Herbaceous Vegetation was only mapped in the park in five locations,
four by the northern headquarters office and one in the central neck section of the park.
Photosignature: Because the different grass species (especially the Bouteloua) were difficult to distinguish
from one another on the aerial photos, this type was not mapped. Black grama was observed to occur
in patches in the midst of other vegetation types and was usually incorporated into the surrounding map
classes (e.g. Sandsage Colorado Plateau Shrubland).
G23
Figure.G39..Ground.photo.for.map.class.B20,.
Black.Grama.-.Galleta.Herbaceous.Vegetation.
Figure.G40..Photosignature.for.map.class.B20,.
Black.Grama.-.Galleta.Herbaceous.Vegetation.
Plant communities
Bouteloua eriopoda - Pleuraphis jamesii Herbaceous
Vegetation
Group map class Inter-Mountain Basins Semi-Desert Grassland (1 of 7)
Management map class Alkali Sacaton Steppe and Mixed Grasslands (1 of 8)
Macrogroup map class
Inter-Mountain Basins Semi-Desert Grassland and
Steppe (1 of 17)
Number of map units in park 5
Number of map units in park & environs 5
Number of map units less than 0.5 ha 1 (0.8% of total map class area)
Area of map class in park
23.6 ha / 58.3 ac
Total area of map class
23.6 ha / 58.3 ac
Proportion of land cover in park 0.1%
Proportion of map class in project environs 0.0%
Base map class accuracy
user 0.0, producer NS
Group map class accuracy user 69.3 (60.8 - 76.7), producer 44.9 (38.0 - 51.9)
Management map class accuracy user 73.0 (66.9 - 78.3), producer 64.0 (58.0 - 69.5)
Macrogroup map class accuracy user 93.0 (90.1 - 95.0), producer 77.2 (73.3 - 80.6)
Documentation for base map class
4 2003 relevés, 1 1996 relevés, 1 AA observation sites
Appendix G: Map Class summaries