Thurston Streams

Thurston County Hydro/Stream data originated as coverage file representation of the Thurston County hydro network. It included all waterbodies: rivers, lakes, ponds, inlets and streams. The features were digitized by the Thurston GeoData Center from the Thurston Comap, Assessor's Data dated 1990, and Tiger Files using rubber sheeting and aerial digitizing. Attribute information, including DNR Classifications and Naming, originated from Washington State DNR and Department of Ecology. In 2002-2003 the data was updated along Marine Shorelines using updated Aerial Photography. In 2011 the hydro coverage file were converted into feature class files during which process stream and river data was separated from other waterbodies; large river areas, lakes, ponds, and marine areas. The datasets were renamed to Streams and Waterbodies respectively. In 2014 some minor adjustments were made to both layers in the Lake Lawrence area as the result of LiDAR derived hydro enforced DEM data. Other changes that have been made to the data include Stream Name/Attribute information. These changes are made when authoritative information is received from USGS GNIS in regards the naming or renaming of streams. Future plans are in place for revisions to the data to more accurately reflect waterbody locations. Last Updated - February 28, 2017

本数据集为瑟斯顿县水文/溪流数据，最初以覆盖文件（coverage file）的形式表征瑟斯顿县水文网络，涵盖河流、湖泊、池塘、海湾及溪流在内的所有水体类型。数据集要素由瑟斯顿地理数据中心（Thurston GeoData Center）采用橡皮片校正与航空数字化技术，从1990年版瑟斯顿Comap、评估员数据以及Tiger文件中完成数字化。包含DNR（Department of Natural Resources，自然资源部）分类与命名的属性信息，其数据来源为华盛顿州DNR与华盛顿州生态部（Department of Ecology）。2002至2003年，研究团队基于更新后的航空摄影资料，对沿海岸线的水文数据进行了更新。2011年，原水文覆盖文件被转换为要素类文件（feature class files），在此过程中溪流与河流数据从大型河流区域、湖泊、池塘及海洋区域等其他水体中分离，两个数据集分别被重命名为溪流数据集与水体数据集。2014年，基于激光雷达（LiDAR）生成的水文强化数字高程模型（DEM）数据，研究人员对劳伦斯湖区域的两个数据图层进行了小幅调整。该数据集的其他变更还包括溪流名称与属性信息的更新，此类变更均基于美国地质调查局（USGS）地理名称信息系统（GNIS）提供的权威溪流命名或更名信息完成。目前已制定后续修订计划，以进一步优化数据，更精准地呈现水体位置。最后更新日期：2017年2月28日