Darwin Harbour Habitat Mapping Program: Topographic relief

This resource contains a topographic relief grid for the greater Darwin Harbour region as part of a baseline seabed mapping program of Darwin Harbour and Bynoe Harbour. This project was funded through offset funds provided by an INPEX-led Ichthys LNG Project to the Northern Territory Government’s Department of Environment and Natural Resources (NTG-DENR) with co-investment from Geoscience Australia (GA) and the Australian Institute of Marine Science (AIMS). The intent of this program is to improve knowledge of the marine environments in the Darwin and Bynoe Harbour regions by collating and collecting baseline data that enable the creation of thematic habitat maps and information to underpin marine resource management decisions. The topographic relief grid was derived from a compilation of multiple surveys undertaken by GA, AIMS and NTG-DENR between 2011 and 2017, including GA0333 (Siwabessy et al., 2015), GA0341 (Siwabessy et al., 2015), GA0351/SOL6187 (Siwabessy et al., 2016), GA4452/SOL6432 (Siwabessy et al., 2017), GA0356 (Radke et al., 2017), and GA0358 and GA0359 (Radke et al., 2018), adding to those from previous surveys GA4425 and GA0333 collected by GA, AIMS, NTG-DENR and Darwin Port Authority. The data is calculated from the bathymetry data and measures the topographic relief at a local seabed. It represents the difference in bathymetry between the highest and lowest points within the local area.

本数据集作为达尔文港与拜诺港基线海底测绘项目的组成部分，包含大达尔文港区域的地形起伏网格（topographic relief grid）。本项目的资金由INPEX牵头的伊西斯液化天然气项目提供的补偿资金拨付至北领地政府环境与自然资源部（NTG-DENR），并由澳大利亚地质调查局（GA）与澳大利亚海洋科学研究所（AIMS）提供联合投资。本测绘项目旨在通过整理与采集基线数据，编制专题生境地图并提供支撑性信息，以深化对达尔文港与拜诺港区域海洋环境的认知，为海洋资源管理决策提供依据。该地形起伏网格由GA、AIMS与NTG-DENR在2011至2017年间开展的多份勘测数据汇编而成，涵盖GA0333（Siwabessy等，2015）、GA0341（Siwabessy等，2015）、GA0351/SOL6187（Siwabessy等，2016）、GA4452/SOL6432（Siwabessy等，2017）、GA0356（Radke等，2017）以及GA0358、GA0359（Radke等，2018）的勘测数据，同时补充了GA、AIMS、NTG-DENR与达尔文港管理局此前开展的GA4425与GA0333勘测数据。该数据由水深数据（bathymetry data）计算得到，用于表征局部海底的地形起伏，即局部区域内最深与最浅点的水深差值。