Accuracy varies for different locations, dates, and interpreters. Drained wetlands are mapped as uplands if wetlands vegetation is not present, or if land is farmed or developed. Managed forests in hydric areas may be mapped as Forested Depression - Pine or as uplands. Classification system was modified slightly after the first county, Seminole, was completed. Coding method varies somewhat between interpreters, such as in the use of modifiers or secondary codes.
Consistency is enhanced by the small number of interpreters and team approach.
No coding is done outside District boundaries. In some quads one or more counties were not mapped. Unmapped areas are coded EX for external. The non-wetlands matrix is coded as U, for upland. Uplands areas may include hydric soils or drained wetlands.