Global Bathymetry and Topography at 15 Arc Sec: SRTM15+ V2.1

<p>The global bathymetry and topography grid at 15 Arc Sec is the latest iteration of the SRTM+ digital elevation model (DEM) where the \"plus\" indicates the addition of ocean bathymetry from shipboard soundings and satellite-derived predicted depths. This DEM is a global elevation grid with a spatial sampling interval of 15 arc seconds (approximately 500 x 500 m pixel size at the equator). New data consists of >33.6 million multibeam and singlebeam measurements collated by several institutions, namely, the National Geospatial-Intelligence Agency, Japan Agency for Marine-Earth Science and Technology, Geoscience Australia, Center for Coastal and Ocean Mapping, and Scripps Institution of Oceanography. New altimetry data consists of 48, 14, and 12 months of retracked range measurements from Cryosat-2, SARAL/AltiKa, and Jason-2, respectively. Onshore, topography data are sourced from previously published digital elevation models, predominately SRTM-CGIAR V4.1 between 60N and 60S. ArcticDEM is used above 60N, while Reference Elevation Model of Antarctica is used below 62S.</p> <p> <b><u>For more information on this dataset, see its associated publication:</b></u> <br /> <i>Tozer, B, Sandwell, D. T., Smith, W. H. F., Olson, C., Beale, J. R., & Wessel, P. (2019). Global bathymetry and topography at 15 arc sec: SRTM15+. Earth and Space Science, 6, 1847. https://doi.org/10.1029/2019EA000658 </i> <br /><br />or visit the <a href='https://topex.ucsd.edu/WWW_html/srtm15_plus.html'>project website here</a> for more details.</p>

<p>15角秒分辨率全球水深地形网格是SRTM+数字高程模型（DEM）的最新迭代版本，其中的"+"代表加入了船载测深数据与卫星反演预测水深得到的海洋水深数据。该数字高程模型为全球高程网格，空间采样间隔为15角秒（赤道处像素尺寸约为500×500米）。本次新增数据包含超过3360万条多波束与单波束测深测量数据，由多家机构整合完成，分别为美国国家地理空间情报局、日本海洋地球科学技术厅、澳大利亚地球科学局、海岸与海洋测绘中心以及斯克里普斯海洋研究所。新增测高数据分别包含48个月、14个月与12个月的Cryosat-2、SARAL/AltiKa以及Jason-2卫星的重跟踪距离测量数据。陆地区域的地形数据则源自已公开的数字高程模型：南北纬60度之间的区域主要采用SRTM-CGIAR V4.1；北纬60度以北区域使用ArcticDEM，南纬62度以南区域则采用南极参考高程模型（Reference Elevation Model of Antarctica）。</p><p> <b><u>如需了解该数据集的更多信息，请参阅其关联学术论文：</b></u> <br /> <i>Tozer, B, Sandwell, D. T., Smith, W. H. F., Olson, C., Beale, J. R., & Wessel, P. (2019). Global bathymetry and topography at 15 arc sec: SRTM15+. Earth and Space Science, 6, 1847. https://doi.org/10.1029/2019EA000658 </i> <br /><br />或访问<a href='https://topex.ucsd.edu/WWW_html/srtm15_plus.html'>本项目官网</a>以获取更多细节。</p>