Continuously Updated Digital Elevation Model (CUDEM) - 1/9 Arc-Second Resolution Bathymetric-Topographic Tiles

NOAA's National Centers for Environmental Information (NCEI) is developing a suite of digital elevation models (DEMs) for the U.S. coast to support a variety of NOAA missions, including improved inundation modeling and mapping, habitat characterization, and visualization of Earth's surface. The DEMs are being developed according to a 0.25 degree tiling scheme. The spatial resolution of the tiles "telescopes" from the coastal zone to the deep ocean floor at 1/9, 1/3, and 3 arc-second grid resolution. Only the 1/9 arc-second DEM tiles integrate both bathymetric and topographic data; all other resolutions map bathymetry only. The tiling of the DEMs facilitates targeted, rapid updates as new coastal and marine elevation data are acquired and become available. Bathymetric and topographic data utilized for DEM creation originate from a variety of sources, including (but not limited to) the NOAA Office of Coast Survey, NOAA National Geodetic Survey, NOAA Office for Coastal Management, U.S. Geological Survey, and the U.S. Army Corps of Engineers.

美国国家海洋和大气管理局（NOAA）的国家环境信息中心（NCEI）正在开发一套针对美国海岸的数字高程模型（DEM），以支持包括改进的淹没模型和制图、栖息地特征描述以及地球表面可视化在内的多种NOAA任务。这些DEM是根据0.25度瓦片方案进行开发的。瓦片的空间分辨率从海岸区到深海海底依次为1/9、1/3和3弧秒网格分辨率，其“望远镜”功能将空间分辨率从海岸区延伸至深海海底。仅1/9弧秒的DEM瓦片整合了海洋地形和地貌数据；其他所有分辨率的地图仅映射海洋地形。DEM的瓦片布局使得在获取并可用新的海岸和海洋高程数据时，能够实现有针对性的快速更新。用于创建DEM的海洋地形和地貌数据来源于多个渠道，包括但不限于NOAA海岸测量办公室、NOAA国家大地测量调查局、NOAA海岸管理办公室、美国地质调查局以及美国陆军工程兵团。