Obsolete or unused items removed. Converted to workstation. The individual state data were reviewed by the state authors of the 1986 National Water Summary Report. U.S. Geological Survey, Water Resources Div. Attribute accuracy is described, where present, with each attribute defined in the Entity and Attribute Section.
Point features present.
This is different from horizontal resolution as reported in the DOC file. Data are not included for every state. U.S. Geological Survey, Water Resources Div.