King County NWI Wetlands with LLWW, HGM and Function Attributes

For more information about this layer please see the GIS Data Catalog. The project, entitled “King County Wetland Inventory Update, King County, WA ” used geospatial techniques and image interpretation processes to remotely map and classify wetlands (includes deepwater habitats) and riparian areas in King County, WA. Wetlands for the project area were mapped and classified using on-screen digitizing methods in a Geographical Information System (GIS). This process was supported by development of a selective image interpretation key that resulted from field verification of image signatures and wetland classifications. Wetland image interpretation employed a variety of input image and collateral data sources, as well as field verification techniques. All mapping was completed at an on-screen scale of 1:5,000 or larger in compliance with national wetland mapping standards. The primary source imagery for mapping consisted of Eagleview, 2021, one-quarter foot, true-color pictometry. 8-bit, tiled orthophotography in TIFF format published by King County and mosaiced by GSS. Collateral data used in the mapping process included Light Detection and Ranging (LiDAR) Digital Elevation Model (DEM) 1.5 ft resolution and LiDAR derived products such as hillshade, contours, depth grids, and synthetic flow networks; King County Digital Surface Model Vegetation Height; King County Coho intrinsic potential stream layer; Beaver Intrinsic Potential (BIP); Historic National Wetland Inventory (NWI); National Hydrography Dataset (NHD) springs and watershed boundaries; ESRI basemap imagery; and Google Earth Time Slider True Color Imagery (GE); King County wetland layers; King County Stormwater features; King County wetland mitigation sites; King County Habitat Restoration sites; and Wetland Intrinsic Potential (WIP). All feature creation and attribution were completed with on-screen digitization procedures using ESRI, ArcGIS Pro 3.2.0 with advanced editing too如需了解该图层的更多信息，请参阅地理信息系统（GIS）数据目录。题为《华盛顿州金县湿地清查更新》的项目，采用地理空间技术与图像解译流程，对华盛顿州金县范围内的湿地（包含深水生境）与滨水区域开展遥感制图与分类工作。本项目通过地理信息系统（GIS）中的屏幕数字化方法，完成了项目区域内湿地的制图与分类。该流程依托一套经影像特征与湿地分类野外验证得出的筛选型图像解译准则得以实现。湿地图像解译工作整合了多种输入影像及辅助数据源，并结合野外验证技术。所有制图工作均严格遵循国家湿地制图标准，以1:5000或更大的屏幕显示比例尺完成。本次制图的核心源影像为2021年发布的Eagleview四分之一英尺分辨率真色彩航空摄影测量图：由金县发布、GSS拼接的8位分块TIFF格式正射影像。制图过程中使用的辅助数据包括：分辨率1.5英尺的光检测和测距（LiDAR）数字高程模型（DEM），以及由其衍生的山体阴影、等高线、深度栅格与合成径流网络等产品；金县数字表面模型植被高度数据；金县银大马哈鱼（Coho）潜在栖息地溪流图层；海狸潜在栖息地（BIP）；历史版国家湿地清查（NWI）数据；国家水文数据集（NHD）的泉点与流域边界；ESRI底图影像；谷歌地球时间滑块真彩色影像（GE）；金县湿地图层；金县雨水管理设施；金县湿地缓减场地；金县栖息地恢复场地；以及湿地潜在栖息地（WIP）。所有要素的创建与属性赋值均通过ESRI ArcGIS Pro 3.2.0的屏幕数字化流程及高级编辑工具完成。