NSW Office of Environment and Heritage (OEH) Single-beam Bathymetry and Coastal Topography Surveys

Data products from elevation/bathymetry surveys carried out by the New South Wales Office of Environment and Heritage (OEH). Surveys were conducted in and around NSW Coastal and State Waters, using 1) single-beam echosounder, 2) terrestrial laser scanner and/or 3) pole-mounted Leica positioning unit (beach cross section) for the state?s coastal surveying program. The program is ongoing and provides highly accurate and precise, fine-scale elevation data for NSW nearshore, estuaries and beaches. Single-beam and beach cross-section surveys are most often provided as 5m binned along track transect data whereas laser scanner data are usually better than 5m binned grids for use in GIS applications. Data are often combined and issued as PDF survey maps relative to Local or Australian Height Datum. Generally, survey and data processing details are included as txt format files or more recently (>2011) in a "scientific rigour" statement. A shape file is also provided showing the geographic coverage of the survey (ESRI shapefile and Google KMZ formats).

本数据集为新南威尔士州环境与遗产局（New South Wales Office of Environment and Heritage，OEH）开展的高程/水深测量所产出的数据产品。本次测量覆盖新南威尔士州沿海及州管海域范围，采用的测量手段包括：1）单波束测深仪（single-beam echosounder）、2）地面激光扫描仪（terrestrial laser scanner），以及3）杆装徕卡定位单元（用于海滩断面测量，pole-mounted Leica positioning unit），服务于该州的沿海测量项目。该项目仍在持续推进中，可为新南威尔士州近岸水域、河口及海滩提供高精度、高分辨率的精细尺度高程数据。单波束测量与海滩断面测量的数据通常以沿轨分箱为5米的断面数据形式提供；而激光扫描仪测量数据则多为优于5米分箱的网格数据，适配地理信息系统（GIS）应用需求。各类数据常被整合后，以相对于地方高程基准或澳大利亚高程基准（Australian Height Datum）的PDF测量图集形式发布。通常，测量与数据处理的详细信息会以TXT格式文件提供；2011年之后的相关数据则多附带"scientific rigour"说明文件。此外还会提供用于展示测量地理覆盖范围的形状文件（ESRI shapefile与Google KMZ格式）。