The Tompkins County Planning Department utilized inter-departmental mapping expertise of the Tompkins County Information Technology Services GIS Division to produce a data set of surface water features for Tompkins County, New York. The need for this data set has been identified by various county departments, local municipal agencies, and other not-for-profit organizations. To provide a complete network of streams within the county boundaries and to add enough basic attributes that a fundamental degree of categorization would be achieved. To provide a stream layer for map production and to provide a framework for relating streams to external databases.