Data, digitized from a georeferenced source map .TIF image(s) (300dpi), is assumed to meet National Map Accuracy Standards. The maximum root mean square (RMS) horizontal accuracy of the georeferenced image as measured in ArcMap is #PAM# meters. The PRECISION of any Shapefile (.SHP) files is DOUBLE. Coordinate tics on the georeferenced (registered and rectified) source map image(s) were checked against control points that had the exact specified coordinates of the tic. The direct distance between the image tic and its control point were measured. All measured distances were less than 50% of the required distance to meet National Map Accuracy Standards (1/50th of an inch for maps at 1:20,000 scale and smaller). Features were checked (QCd) after digitizing for positional accuracy errors using the georeferenced source map image.