Seabed morphology and geomorphology of the Beagle Marine Park, south-eastern Australia - Version 1
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This data product contains geospatial seabed morphology and geomorphology information for the Beagle Marine Park and is intended for use by marine park managers, regulators, the general public and other stakeholders. A nationally consistent two-part (two-step) seabed geomorphology classification system was used to map and classify the distribution of key seabed features. In step 1, semi-automated GIS mapping tools (GA-SaMMT; Huang et al., 2022; eCat Record 146832) were applied to bathymetry digital elevation models (DEM) in a GIS environment (ESRI ArcGIS Pro) to map polygon extents (topographic high, low, and planar) and quantitatively characterise their geometries. The geometric attributes were then used to classify each shape into discrete Morphology Feature types (Part 1: Dove et al., 2020; eCat Record 144305). In step 2, the seabed geomorphology was interpreted by applying additional datasets and domain knowledge to inform their geomorphic characterisation (Part 2: Nanson et al., 2023; eCat Record 147818). Where available, backscatter intensity, seabed imagery, seabed sediment samples and sub-bottom profiles supplemented the bathymetry DEM and morphology classifications to inform the geomorphic interpretations.The Beagle Marine Park seabed morphology and geomorphology features were informed by a post survey report (Barrett et al., 2021). Seabed units were classified at multiple resolutions that were informed by the underlying bathymetry: · A broad scale layer represents features that were derived from a 30 m horizontal resolution compilation DEM (Beaman et al 2022; eCat Record 147043). · A series of medium and fine scale feature layers were derived from individual 1 m horizontal resolution DEMs (Nichol et al., 2019; eCat Record 130301). The data product and application schema are fully described in the accompanying Data Product Specification. Barrett, N, Monk, J., Nichol, S., Falster, G., Carroll, A., Siwabessy, J., Deane, A., Nanson, R., Picard, K., Dando, N., Hulls, J., and Evans, H. (2021). Beagle Marine Park Post Survey Report: South-east Marine Parks Network. Report to the National Environmental Science Program, Marine Biodiversity Hub. University of Tasmania.Beaman, R.J. (2022). High-resolution depth model for the Bass Strait -30 m. https://dx.doi.org/10.26186/147043, GA eCat Record 147043. Dove, D., Nanson, R., Bjarnadóttir, L. R., Guinan, J., Gafeira, J., Post, A., Dolan, Margaret F.J., Stewart, H., Arosio, R., Scott, G. (2020). A two-part seabed geomorphology classification scheme (v.2); Part 1: morphology features glossary. Zenodo. https://doi.org/10.5281/zenodo.4075248; GA eCat Record 144305 Huang, Z., Nanson, R. and Nichol, S. (2022). Geoscience Australia's Semi-automated Morphological Mapping Tools (GA-SaMMT) for Seabed Characterisation. Geoscience Australia, Canberra. https://dx.doi.org/10.26186/146832; GA eCat Record 146832 Nanson, R., Arosio, R., Gafeira, J., McNeil, M., Dove, D., Bjarnadóttir, L., Dolan, M., Guinan, J., Post, A., Webb, J., Nichol, S. (2023). A two-part seabed geomorphology classification scheme; Part 2: Geomorphology classification framework and glossary (Version 1.0) (1.0). Zenodo.https://doi.org/10.5281/zenodo.7804019; GA eCat Record 147818
本数据集包含比格尔海洋公园（Beagle Marine Park）的空间海底地貌形态与海底地貌学信息，供海洋公园管理者、监管机构、社会公众及其他利益相关方使用。本研究采用全国统一的两阶段（两步法）海底地貌分类体系，对关键海底地貌要素的分布进行制图与分类。 第一步，在地理信息系统（Geographic Information System, GIS）环境（ESRI ArcGIS Pro）中，将半自动化GIS制图工具（GA-SaMMT；Huang等，2022；GA eCat记录146832）应用于水深数字高程模型（Bathymetry Digital Elevation Model, DEM），勾绘地形高地、低地与平地的多边形范围，并定量表征其几何形态。随后利用几何属性将每个多边形归类为独立的地貌形态要素类型（第一部分：Dove等，2020；GA eCat记录144305）。 第二步中，通过整合额外数据集与领域专业知识对海底地貌进行解译，以明确其地貌特征（第二部分：Nanson等，2023；GA eCat记录147818）。若有可用数据，则通过反向散射强度、海底影像、海底沉积物样品及亚底剖面，补充水深数字高程模型与地貌形态分类结果，辅助开展地貌解译。 比格尔海洋公园的海底地貌形态与地貌要素信息源自一份后调查报告（Barrett等，2021）。海底单元依据底层水深数据，按多分辨率进行分类： · 粗尺度图层：源自30米水平分辨率合成水深数字高程模型（Beaman等，2022；GA eCat记录147043）所提取的地貌要素。 · 中尺度与细尺度图层系列：源自单景1米水平分辨率水深数字高程模型（Nichol等，2019；GA eCat记录130301）所提取的地貌要素。 本数据集及其应用架构已在随附的《数据集规范》中进行完整说明。 Barrett, N., Monk, J., Nichol, S., Falster, G., Carroll, A., Siwabessy, J., Deane, A., Nanson, R., Picard, K., Dando, N., Hulls, J. & Evans, H. (2021). Beagle Marine Park Post Survey Report: South-east Marine Parks Network. Report to the National Environmental Science Program, Marine Biodiversity Hub. University of Tasmania. Beaman, R.J. (2022). High-resolution depth model for the Bass Strait -30 m. https://dx.doi.org/10.26186/147043, GA eCat Record 147043. Dove, D., Nanson, R., Bjarnadóttir, L.R., Guinan, J., Gafeira, J., Post, A., Dolan, Margaret F.J., Stewart, H., Arosio, R. & Scott, G. (2020). A two-part seabed geomorphology classification scheme (v.2); Part 1: morphology features glossary. Zenodo. https://doi.org/10.5281/zenodo.4075248; GA eCat Record 144305 Huang, Z., Nanson, R. & Nichol, S. (2022). Geoscience Australia's Semi-automated Morphological Mapping Tools (GA-SaMMT) for Seabed Characterisation. Geoscience Australia, Canberra. https://dx.doi.org/10.26186/146832; GA eCat Record 146832 Nanson, R., Arosio, R., Gafeira, J., McNeil, M., Dove, D., Bjarnadóttir, L., Dolan, M., Guinan, J., Post, A., Webb, J. & Nichol, S. (2023). A two-part seabed geomorphology classification scheme; Part 2: Geomorphology classification framework and glossary (Version 1.0). Zenodo. https://doi.org/10.5281/zenodo.7804019; GA eCat Record 147818
