Arc ASCII and GeoTiff DEMs of the North-Central California Coast (DEM_#_ASCII and DEM_#_GeoTIFF)

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.本研究针对旧金山湾区（金门大桥外侧）的开放海岸区域构建了一套2米分辨率的无缝数字高程模型（Digital Elevation Model, DEM），其覆盖范围沿加利福尼亚中北部海岸线延伸，西起半月湾（Half Moon Bay）、东至博德加角（Bodega Head）。本次构建的核心目标为整合当前可获取的最新高分辨率测深与地形数据集，例如激光雷达（Light Detection and Ranging, lidar）地形数据、多波束及单波束声呐测深数据，以生成一套无缝表面模型，该模型向海延伸至少3海里，向陆覆盖至+20米高程等高线以外区域。