The Tompkins County Planning Department utilized inter-departmental mapping expertise of the Tompkins County Information Technology Services GIS Division to produce defined watershed boundaries for surface water features for Tompkins County, NY. The need for this data set has been identified by various county departments, local municipal agencies, and other not-for-profit organizations. To produce boundaries for watersheds as they were defined for the Tompkins County Planimetric Hydrography data set.