The 2001 vegetation sample plots were grouped by stratified plant cover based on
    2002 aerial photo interpretation. If any species in a sample plot inside a
    stratified sample unit polygon was returned in a query of >= 50% areal cover, it
    was assigned a status of a dominant species in that sample unit polygon. If any
    species in a sample inside a stratified sample unit polygon was returned
    in a query of >= 20% And <50% areal cover, it was assigned the status of a
    subordinate species in that sample unit polygon. However, a simpler more
    generalized field was used to display plant communities in this map. The criteria
    were the highest percent cover by dominant species present with ties going to the
    superior structural type (e.g.,trees over shrubs and shrubs over herbaceous or
    emergent plants). In this category the common name was used instead of the scien-
    tific name.