Multi-resolution bathymetry composite surface for Australian waters (EEZ)

This dataset is a mosaicked product of all publicly available bathymetry data within the Australian Exclusive Economic Zone (EEZ). The data package consists of 8x bathymetry mosaics (and associated bathymetry derivatives: hillshade, slope, aspect) for each of the 8x Parks Australia Management Effectiveness Ecosystem Component depth zones ("Ecosystem Zones"). The grid resolution of the mosaics has been guided by the depth gridding recommendations of the AusSeabed Australian Multibeam Guidelines (2020) to produce the following mosaics: • shallow zone (0-30m): 10m resolution • mesophotic zone (30-70m): 10m resolution • rariphotic zone (70-200m): 10m resolution • upper-slope zone (200-700m): 32m resolution • mid-slope zone (700-2,000m): 64m resolution • lower-slope zone (2,000-4,000m): 128m resolution • abyss zone (4,000-6,000m): 210m resolution • hadal zone (>6,000m): 210m resolutionA systematic prioritisation approach was used to preferentially use newer, high-resolution, and cleaner bathymetry inputs from remote sensing (multibeam, singlebeam, satellite, seismic etc), with Digital Elevation Models (DEM) used as foundational data in regions where survey data was not available. This approach optimised spatial resolution by preserving higher resolutions in shallower waters as supported by the data, while also ensuring the output datasets remain manageable for downstream applications. The result is suite of depth-stratified bathymetry mosaics and associated derivatives that provide full coverage of Australia's marine estate (clipped to the boundaries of the Australian Exclusive Economic Zone (EEZ)). All publicly available bathymetry data as at July 2024 for was included. Data can be visualised and used in GIS packages as maps of hillshaded bathymetry and hillshaded slope at the following WMS endpoints: • bathymetry: https://geoserver.imas.utas.edu.au/geoserver/bathy_composites/AusEEZ_bathy_composite_multires/wms?request=GetCapabilities&service=WMS • hillshade: https://geoserver.imas.utas.edu.au/geoserver/bathy_composites/AusEEZ_bathy_hillshade_composite_multires/wms?request=GetCapabilities&service=WMS • slope: https://geoserver.imas.utas.edu.au/geoserver/bathy_composites/AusEEZ_bathy_slope_composite_multires/wms?request=GetCapabilities&service=WMS • aspect: https://geoserver.imas.utas.edu.au/geoserver/bathy_composites/AusEEZ_bathy_aspect_composite_multires/wms?request=GetCapabilities&service=WMS • aspect-slope (for mapping applications only): https://geoserver.imas.utas.edu.au/geoserver/bathy_composites/AusEEZ_bathy_aspectSlope_composite_multires/wms?request=GetCapabilities&service=WMSData is available for download in the following packages (each structured as 8x mosaics for each Ecosystem Zone at the gridding resolution specified above): (1) bathymetry composites; (2) hillshade composites; (3) slope composites; (4) aspect composites.An ancillary Shapefile footprint index file is also available showing the source data used in generating each region of the mosaics.Note that minimal cleaning of input data was conducted, and no attempt was made to smooth or blend the transitions between swath edges, or between swaths and the underlying DEMs. Consequently, noise and edge effects between adjacent input data may be visible. This should be considered when interpreting the data, and the data should not be used for navigational purposes.See the Lineage section of this record for full methodology.

本数据集为澳大利亚专属经济区（Australian Exclusive Economic Zone, EEZ）内所有公开可获取的水深数据的镶嵌合成产品。该数据包包含8组水深镶嵌数据（及配套水深衍生产品：晕渲图、坡度、坡向），对应澳大利亚公园管理局（Parks Australia）制定的8个生态组件深度分区（"生态分区"）的管理效能评估需求。
本次镶嵌合成的网格分辨率遵循《AusSeabed澳大利亚多波束指南（2020）》中的水深网格化建议，生成以下分区镶嵌数据：
• 浅海分区（0-30m）：10米分辨率
• 中光分区（30-70m）：10米分辨率
• 寡光分区（70-200m）：10米分辨率
• 上坡分区（200-700m）：32米分辨率
• 中坡分区（700-2000m）：64米分辨率
• 下坡分区（2000-4000m）：128米分辨率
• 深渊分区（4000-6000m）：210米分辨率
• 超深渊分区（>6000m）：210米分辨率
本数据集采用系统优先排序方法，优先选用遥感获取的新型、高分辨率且高质量的水深输入数据（多波束、单波束、卫星、地震探测等），在无勘测数据的区域则以数字高程模型（Digital Elevation Models, DEM）作为基础数据。该方法依托实测数据支持，在浅水区保留更高分辨率以优化空间分辨率，同时确保输出数据集可适配下游应用的处理需求。
最终生成的数据集包含多组按深度分层的水深镶嵌数据及配套衍生产品，完整覆盖澳大利亚海洋领地（已裁剪至澳大利亚专属经济区（EEZ）边界）。本数据集纳入了截至2024年7月的全部公开可获取水深数据。
用户可通过以下网络地图服务（Web Map Service, WMS）端点可视化并在地理信息系统（Geographic Information System, GIS）软件中使用晕渲水深图与晕渲坡度图：
• 水深数据：https://geoserver.imas.utas.edu.au/geoserver/bathy_composites/AusEEZ_bathy_composite_multires/wms?request=GetCapabilities&service=WMS
• 晕渲图：https://geoserver.imas.utas.edu.au/geoserver/bathy_composites/AusEEZ_bathy_hillshade_composite_multires/wms?request=GetCapabilities&service=WMS
• 坡度数据：https://geoserver.imas.utas.edu.au/geoserver/bathy_composites/AusEEZ_bathy_slope_composite_multires/wms?request=GetCapabilities&service=WMS
• 坡向数据：https://geoserver.imas.utas.edu.au/geoserver/bathy_composites/AusEEZ_bathy_aspect_composite_multires/wms?request=GetCapabilities&service=WMS
• 坡向-坡度数据（仅适用于制图应用）：https://geoserver.imas.utas.edu.au/geoserver/bathy_composites/AusEEZ_bathy_aspectSlope_composite_multires/wms?request=GetCapabilities&service=WMS
数据可通过以下数据包下载（每个数据包均包含按上述网格化分辨率生成的8组生态分区镶嵌数据）：(1) 水深合成数据集；(2) 晕渲图合成数据集；(3) 坡度合成数据集；(4) 坡向合成数据集。
本数据集还附带一个辅助的Shapefile格式覆盖范围索引文件，用于展示生成各镶嵌区域所使用的源数据。
请注意，本数据集仅对输入数据进行了最低限度的清洗，未尝试平滑或融合条带边缘之间、条带与底层数字高程模型之间的过渡区域。因此，相邻输入数据之间可能存在噪声与边缘效应，在解读数据时需加以考虑，且本数据集不得用于导航用途。
完整的方法学细节请参阅本记录的谱系章节。