SDE Feature Class
biota, California, vegetation, San Felipe Valley, San Diego County, environment
The map was created to aid in preparation of a management plan for the Wildlife Area by Jones and Stokes Associates under contract to DFG; to focus selection of animal monitoring points; to allow monitoring of vegetation change over time; and to allow modeling of habitat for sensitive or otherwise important species. The 174 vegetation field samples were marked using Garmin 12 XL GPS units and can serve as long-term monitoring points. Additionally, eight digital ground-level photographs were taken facing 8 cardinal directions (N, NE, E, SE, etc.) at each sample location. (The vegetation sample and ground photo datasets are available through the Vegetation Classification and Mapping Program.) DATA ASSUMPTIONS AND LIMITATIONS: No accuracy assessment of this map has been performed, although other maps using similar methodology have roughly 80% accuracy. Most of the sample points were at the higher elevations on Vulcan Mountain or in the lower elevations; the mid-elevations in the western portion of the WLA were largely inaccessible and so map accuracy may be lower in this area. The minimum mapping unit was 1 acre (1/2 acre for wetland types). KNOWN CAVEATS OF THE DATA: The CIR image on which this map is based predated the 2002 Pines Fire, which burned much of the western half of the Wildlife Area. Although most of the sampling was post-fire, the map represents pre-fire vegetation types.
This Vegetation Map of the San Felipe Valley Wildlife Area in San Diego County, California is based on vegetation samples collected in the field in 2002 and 2005 and on photo interpretation of a 2000 Color Infrared (CIR) Image. The map legend is based on classification of the plots and follows the hierarchical National Vegetation Classification System (USGS-NPS 2005) and Manual of California (Sawyer and Keeler-Wolf 1995). Types are cross-walked to California Wildlife Habitat Relationships (CWHR) and Holland types. No report was produced; this metadata serves to document the entire project. WHAT EACH RECORD REPRESENTS: Each record represents the attributes of the individual polygon in the map layer, including vegetation type, structural information, and disturbance information. The map represents vegetation as it existing prior to the 2002 Pines Fire. Polygons are attributed to the lowest level of the classification hierarchy allowed by the image resolution and comfort level of the photo interpreter. Thus, individual polygons are mapped to the Formation, Alliance or Association level. Several "mapping units" not in the vegetation classification were also used in the mapping classification (=map legend). The hierarchical classification and crosswalk allow mapping at coarser levels or in different systems (e.g., CWHR). If mapping at the Formation level (the "1000s" in the spreadsheet), please consider including the California juniper types 2106, 2171, 2172 and 2173 in the 4000s (Evergreen Shrubland). This juniper is considered a tree in the national classification, but is more shrub-like and its desert affinities make California juniper types fit more logically into the Evergreen Shrubland Formation.
Vegetation Classification and Mapping Program, Wildlife and Habitat Data Analysis Branch, California Department of Fish and Wildlife
DFW appreciates learning how our datasets are being used so that we can leverage support for classifying and mapping new areas and let users know of any updates. Please contact Diana Hickson by email or by phone at 916-327-5956.