Streams

This Layer shows all streams in York County Pennsylvania. The connected network of streams and waterways of York County are indicated as single lines in this coverage. Waterways are given connected topology to show the direction of flow from the headwaters of the stream through the watershed to the extent of the coverage. With ARC Network data can be used for watershed modelling. This Layer was originated from a Layer from PA DEP. York County has made updates to it as the county staff saw fit. With most nobable update being the hidden field used if it was hidden from view in the 2008 PA Map Aerial. Other Aerials used was the 2003 PA Map Aerial and 2015 York County Orthophoto.本图层（Layer）展示宾夕法尼亚州约克县的全部溪流。在本数据覆盖范围内，约克县的溪流与水道连通网络以单线形式呈现。水道已配置连通拓扑结构，可完整展示溪流从源头经流域直至本数据覆盖边界的水流流向。该ARC网络数据集可用于流域建模工作。本图层源自宾夕法尼亚州环境保护部（Pennsylvania Department of Environmental Protection, PA DEP）的原有图层，约克县工作人员结合实际工作需求对其进行了更新优化。其中最显著的一项更新为：针对2008年宾夕法尼亚州航拍地图中被隐藏显示的区域，新增了隐藏字段用于标识。本次更新还参考了2003年宾夕法尼亚州航拍地图与2015年约克县正射影像（Orthophoto）数据。