Extended maps were used on the northern border of Vermont. RMS errors as great as 16 feet could not be avoided in some cases. Canadian topographic maps were used for Lake Champlain subbasins in Quebec. RMS errors here as great as 23 feet. Map dates ranged from 1943 to 1988.
Error only includes error created during the digitizing process.
AAT item values were added and line editing was made as took place. PAT item values were added later. The coverage was then built. No labelerrors or node dangles exist. Annotation of HUCs and SCS codes were added during digitizing process for convenience.