Thurston Waterbodies

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. In 2002-2003 the data was updated along Marine Shorelines using updated Aerial Photography. In 2011 the hydro coverage file was converted into a feature class file, 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. Future plans are in place for revisions to the data to more accurately reflect waterbody locations/delineations. Last updated July 20, 2015 kah

瑟斯顿县水文/溪流数据集最初以覆盖文件（coverage file）格式表征瑟斯顿县水文网络，涵盖所有水体类型：河流、湖泊、池塘、海湾与溪流。该数据集的地理要素由瑟斯顿地理数据中心（Thurston GeoData Center）从瑟斯顿Comap（Thurston Comap）、1990年版评估数据（Assessor's Data）以及Tiger文件（Tiger Files）中提取，并通过橡皮片校正（rubber sheeting）与航空数字化技术完成数字化处理。2002至2003年，团队依托最新航空摄影资料对该数据集的海洋岸线部分进行了更新。2011年，该水文覆盖文件被转换为要素类文件（feature class file），在此过程中溪流与河流数据被从其他水体（大型河流区域、湖泊、池塘及海洋区域）中分离，两个数据集随后分别被重命名为“溪流（Streams）”与“水体（Waterbodies）”。2014年，团队基于激光雷达（LiDAR）生成的水文强化数字高程模型（DEM）数据，对劳伦斯湖（Lake Lawrence）区域的两个数据图层进行了小幅调整。目前已制定后续修订计划，以更精准地呈现水体的位置与边界轮廓。本数据集最后更新于2015年7月20日，维护标识：kah