Process Description:
Stable-base manuscript was manually digitized in board-inches. A root-mean-square error of 0.005 was maintained for each digitizing session. The coverage file was then transformed into the North American Datum of 1983, New Jersey State Plane coordinate feet. A root-mean-square error of 0.005 was obtained. The coverage was checked against the original stable-base manuscript. Any lines which deviated more than .002 inches was re-digitized and rechecked. Attribution of the line features (contours) was performed interactively after digitizing was completed. The coverage was then converted to ESRI's shapefile format.