Input Data Boundary Outlines for DEMs of the North-Central California Coast (DEM_source_data.shp)

A GIS polygon shapefile outlining the boundaries of the native input datasets used to construct a
seamless, 2-meter resolution digital elevation model (DEM) was constructed for the open-coast
region of the San Francisco Bay Area (outside of the Golden Gate Bridge), extending from Half Moon
Bay to Bodega Head along the North-central California coastline. The goal was to integrate the most
recent high-resolution bathymetric and topographic datasets available (for example, Light Detection
and Ranging (lidar) topography, multibeam and single-beam sonar bathymetry) into a seamless surface
model extending offshore at least 3 nautical miles and inland beyond the +20 m elevation contour.

本数据集为一套地理信息系统（GIS）多边形形状文件，用于勾勒用于构建无缝2米分辨率数字高程模型（Digital Elevation Model，DEM）的原生输入数据集的边界。该数据集覆盖旧金山湾区（金门大桥外侧）的开阔海岸区域，沿加利福尼亚中北部海岸线从半月湾延伸至博德加角。本次构建的目标为整合当前可获取的最新高分辨率水深与地形数据集（例如激光雷达（Light Detection and Ranging，LiDAR）地形数据、多波束与单波束声呐水深数据），生成一套无缝地表模型，该模型向海延伸至少3海里，向陆延伸至海拔20米等高线以外区域。