Vegetation Information for the Point Reyes National Seashore Vegetation Inventory Project
Schirokauer D, Keeler-Wolf T, Meinke J, Van Der Leeden P. 2003. Vegetation Information for the Point Reyes National Seashore Vegetation Inventory Project. PRNS, 1 Bear Valley Road, Point Reyes Station, CA 94956
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- Unpublished Report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
- PORE
- Keywords
- Accuracy Assessment, Aerial Photography, alliances, Associations, community association, Digital Orthophoto, Digital Spatial Database, DOQ, DOQQ, Field Data, flight line, GIS, GPS, habitat mapping, Inventory Projects, Landcover, Landscape, National Park, National Park Service Inventory, National Vegetation Classification Standard, National Vegetation Classification System, NVCS, Orthophoto, Plots, U.S. National Vegetation Classification, USNVC, USNVCS, Vegetation Inventory, Vegetation Inventory Report, Vegetation Map Report, Vegetation Mapping, Vegetation Plots