This vector line file represents road, railroad, and municipal boundary centerlines within Monroe County, New York. These centerlines combine for a total of 4,625 centerline miles. According to the U.S. Census Bureau, the County has a total area of 1,366 square miles, of which 659 square miles is land and 706 square miles (51.72%) is water. This layer has been continously updated by the Monroe County Department of Environmental Services since it received the file in 2001 from the Genesee/Finger Lakes Regional Planning Council. It is currently maintained with information provided by the 9-1-1 Emergency Communications Department (ECD), tax parcel data obtained from Monroe County Real Property Services, as well as current aerial photography, street abandonment and dedication reports, and input from municipalities. This layer is the single authoritative source of centerline information in Monroe County.