The data describes individual forest stands that are manged by the agencies mentioned above. The data was originally photo-interpreted. Since then many stands have been field measured. Lastly each agency has translated their detailed data to this, more general, format.
Additional counties are in preparation.
This dataset exists as a regions coverage and as a shapefile. Age of the stand at the time the data was converted to the common format. The year the stand data was collected. The site index as collected in each of the inventories. Site species used to measure the site index.