The topography database currently does not include a sea level shoreline. As a result, land mass between sea level and five feet is not represented. No inland shorelines are represented. Some quads on the Georgia border may be in meters. St. Mary's, to163 Fernandina Beach.
Some quads have ten foot instead of five foot contours.
No water bodies are delineated. 45 quads do not have polygon topology, however, the arcs are coded. This dataset was copied to double precision. Approximately 500,000 arcs and 175,000 polygons are present in the data layer.