Metadata and Map Information

All statewide, county, and vicinity ("zoomed-in") maps are 'Areas of Sudden Oak Death Infestation From Best Available Field Information.
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Data Documentation and Metadata
- Confirmed isolations of Phytophthora ramorum are Sudden Oak Death confirmations provided by University of California at Davis, University of California at Berkeley, and the California Department of Food and Agriculture (CDFA). Confirmations from nurseries or other contained facilities are not depicted on any maps. Sampling is occurring throughout the state. For FDGC-compliant metadata documentation, please see SOD confirmations metadata.
- Approximate location of Phytophthora ramorum in Coast Redwood and/or Douglas Fir are confirmed SOD but are not officially regulated samples, because they are not accurate locations. The current approximate locations were placed in the approximate center of the park they were found in, by digitizing using mapping software (ESRI ArcGIS).
- 1/4 mile buffer around confirmed SOD represent the "zones of infestation". The buffer polygons are created using buffer tool in mapping software (ESRI ArcGIS). For FDGC-compliant metadata documentation, please see 1/4 mile buffer metadata.
- County boundaries were downloaded from the State of California's Spatial Information Library. For FDGC-compliant metadata documentation, please see County metadata.
- Topographic background (both 1:24,000 and 1:100,000 scales) are from National Geographic Seamless USGS Topographic Maps on CD-ROM (for California).
- For the State-wide map, host data is land cover data ("LANDCOV") from the California GAP Analysis Project, queried for current hosts of Phytophthora ramorum. For a list of the current hosts, see the California Oak Mortality Task Force's list of regulated plants. For FDGC-compliant metadata documentation, please see the OakMapper's data explanation page for each of the tree categories of hosts: Tree Species, Foliar Species, and Redwood/Doug-fir Species.