Niagara Falls Base Map

This is a spatial data set containing polygons representing the rivers, the hydro canal and reservoir and the lands of municipalities that surround Niagara Falls. It is intended to be used as part of a more detailed base map.本数据集为空间数据集（spatial data set），包含用于表征尼亚加拉大瀑布周边河流、水利渠道、水库以及各市镇所辖土地的多边形要素。本数据集旨在作为精细化底图的组成部分加以应用。