Plant Community Classification and Mapping Project Final Report: Point Reyes National Seashore, Golden Gate National Recreation Area, San Francisco Water Department Watershed Lands, Mount Tamalpais, Tomales Bay, and Samuel P. Taylor State Parks
Schirokauer D, Keeler-Wolf T, Meinke J, Van Der Leeden P. 2003. Plant Community Classification and Mapping Project Final Report: Point Reyes National Seashore, Golden Gate National Recreation Area, San Francisco Water Department Watershed Lands, Mount Tamalpais, Tomales Bay, and Samuel P. Taylor State Parks
A comprehensive plant community classification and mapping project for a 155,000 acre study area of National Park Service lands in San Francisco Area was conducted between 1997 and 2003. Eighty seven plant communities were described using 366 vegetation plots collected in the various habitats throughout the study area. The vegetation plots were also used as training data for photo interpreters to map plant comminutes using 1:24,000 true color photos. The Minimum Mapping Unit (MMU) was set at 0.5 hectares. Seventy-four plant community or mapping units were delineated using the aerial photographs. The accuracy, at the finest botanical level of resolution, varied by class from 0 to 100%. In addition to using the National Vegetation Classification System, we created a custom classification hierarchy based on ecological similarity as determined during an ordination analysis of the 366 training plots. This custom classification was used as the basis of a modified ‘fuzzy’ (Congalton and Green 1999) approach for accuracy assessment. Overall thematic accuracy varied from 44% at the association level to 87% at the life form level.
- Type
- Unpublished Report
- Authors
- Schirokauer, David; Keeler-Wolf, Todd; Meinke, John; Van Der Leeden, Pam
- Date of Issue
- 2003-07-30
- Units
- FOPO , GOGA , MUWO , PORE , VMI
- Keywords
- Classification, Distribution (Biodiversity), GOGA, Mapping, Observations, Plant communitites, PORE, Presence (Biodiversity), Vegetation