In general, the minimum mapping unit is from 1 to 3 acres depending on the wetland type and the scale and emulsion of the source aerial photography. In regions of the country where evergreen forested wetlands predominate, wetlands smaller than 3 acres may not be mapped. Thus, a detailed of the ground and historical analysis of a single site may result in a revision of the wetland boundaries established through photographic interpretation. In addition, some small wetlands and those obscured by dense forest cover may not be included in this dataset. It is estimated that the line work has an accuracy of 15 to 50 meters based on use of USGS topo maps as a base and the variable water levels that wetlands may have at different times.
Similar coverages exist for county in the state.
Parsed Wetland and Deepwater Habitats Classification. A complex of wetlands and deepwater habitats that share the influence of similar hydrologic, geomorphologic, chemical, or biological factors. Subdivided Systems into more specific categories. The highest taxonomic unit below the Subsystem level. Unparsed Wetland and Deepwater Habitats Classification.