USIBWC Base Map

This map represents base layers for the USIBWC.It has been digitized using a variety of vector and raster data sources. It is intended for mapping purposes only.本地图为美国国际边界与水委员会（USIBWC）提供基础底图图层。该数据集通过多种矢量及栅格数据源完成数字化处理，仅可用于制图用途。