Breakwaters

This hosted feature layer has been published in RI State Plane Feet NAD 83. This dataset shows man-made breakwaters jetties and groins protecting harbors marinas and beaches.本托管要素图层（hosted feature layer）采用罗德岛州平面英尺坐标系（NAD 83）发布。本数据集展示了用于防护港口、游艇码头与海滩的人工防波堤、突堤及丁坝。