USGS Blue Line Streams
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资源简介：
Blue-line stream means that a stream appears as a broken or solid blue line (or a purple line) on a USGS topographic map. Definition from NCDENR Water Resources Frequently Asked Questions http://portal.ncdenr.org/web/wq/swp/ws/401/waterresources/faqs
蓝线水系（Blue-line stream）指在美国地质调查局（USGS）地形图上以虚线、实线蓝线（或紫线）呈现的水系。该定义源自北卡罗来纳州自然资源与环境保护部（NCDENR）水资源常见问题解答，具体网址为http://portal.ncdenr.org/web/wq/swp/ws/401/waterresources/faqs
提供机构：
Wake County创建时间：
2016-06-23
