No attribute accuracy was performed during the data development and completion phases. Attribute accuracy was tested during the data digitizing phase. In addition, WAMS software tests the attributes. Overall, the attribute accuracy is believed high due to the multiple error-checking steps done redundantly during processing. The final accuracy assessment used calculated average accuracy and error rates for the human stages and software verification stages, which were done redundantly to insure double checking verification of the data coverages comprising the data set.
Exact tolerances vary with coverages, as does the date of the processing and testing.
The final accuracy values expressed are the best summation which can be developed from the smaller areas which comprise the data set. The actual final should be considered as average and perhaps conservative or over estimating the percent change of error for areas in this data set. Data is inherently polygonal. Polygons intersecting the neatline are closed along the border. Line segments are a set of sequentially numbered coordinate pairs.