Data
Data Release: June 2007 for FIADB plot data; October 2007 for FIADB Data Mart.
The Oracle Database Management System is used to process and store the ozone indicator data (also called NIMS – National Information Management System). Raw data from field-collected tally files and sample voucher validation files are loaded onto five standard tables:
OZONE_PLOT_TBL
OZONE_VISIT
OZONE_SPECIES
OZONE_PLOT_NOTES
OZONE_VALIDATION
Further processing computes indices and creates three standard summary tables:
OZONE_BIOSITE_SUMMARY
OZONE_PLOT_SUMMARY
OZONE_SPECIES_SUMMARY
These summary tables are used as the presentation data in the public access database. In the public access database, true plot locations are obscured to protect landowner privacy. The database structure is such that flat files can be easily produced for users who do not have access to, or the capability of, database management on their own computers. ASCII data files and maps are available for download from the FIADB Data Mart which is the data distribution system to the public. The FIADB Data Mart is accessible from links on the National FIA Web site (http://fia.fs.fed.us/ - click on “FIA Tools and Data”). All users should access the FIADB User Guide available from the FIADB Data Mart (http://www.fia.fs.fed.us/tools-data/) for detailed guidance on interpreting attribute codes and definitions for the ozone indicator.
In addition to the summary tables, there are two ozone map products available for download from the FIADB Data Mart along with a list of ozone sensitive tree and shrub species. The map products are derived from weighted data that are not readily available (contact: National Ozone Advisor), and true plot locations that are not in the public domain. The first map product is the national ozone risk map which provides an interpolated surface of probable ozone injury across the landscape. The second map product is an interpolated surface of ambient ozone concentrations (e.g., SUM06 data). Data users select their area of interest (e.g., state, region, or eco-region) from these two map products, and use the procedures outlined in the ozone estimation document to calculate and interpret population metrics for the ozone indicator (e.g., volume of ozone susceptible species at low, moderate, and high risk of ozone injury). Overlays of the national ozone risk map with other internal (e.g., crown condition) and external (e.g., seasonal drought) data bases are recommended to enhance the interpretability of the ozone indicator.
Contact your FIA Ozone Regional Coordinators for more information.
Last Modified: 01/03/2008