LINZ NZ Coastline - Mean High Water (Deprecated)

LINZ Data Service (LDS) Item Page - https://data.linz.govt.nz/layer/105085-nz-coastline-mean-high-water/ Note: This layer is now superceded by NZ Coastline - Mean High Water Springs | LINZ Data Service and will be removed by 31 July 2026. Purpose The NZ Coastline – Mean High Water dataset is the first step towards improving the national coastline data for New Zealand. LINZ is currently working on a long-term project, “Coastal Mapping” to capture a range of national coastlines derived from LiDAR and bathymetry. This will enable us to generate coastlines, for example, for Mean High Water Springs, Chart Datum and Highest Astronomical Tide. The project is currently focused on capturing LiDAR and bathymetry data, and the timeframe for delivering the new coastlines will be established once the data capture has progressed. Status This dataset was created from LINZ Hydrographic and Topographic sources in August 2020 and will not be maintained in this form. This dataset will be replaced by a more accurate dataset in the future once data becomes available through the Coastal Mapping project. Data sources and preparation The spatial coastline data (1:50,000 scale) is sourced from the Topo50 series where it is described as a line forming the boundary between the land and sea, defined by mean high water. The source polygon data has been broken up into line segments to enable a coastal classification to be attributed to each segment of coast. Coastal classification data is based on official Electronic Navigational Charts published by the New Zealand Hydrographic Authority. Not all segments have been assigned a coastal category. If you have any questions, please contact us at [e-mail]新西兰土地信息局（Land Information New Zealand, LINZ）数据服务（LDS）项目页面——https://data.linz.govt.nz/layer/105085-nz-coastline-mean-high-water/ 备注：本图层已由《新西兰海岸线——平均高高潮位》| 新西兰土地信息局数据服务 替代，并将于2026年7月31日前下线。 用途：本数据集是新西兰完善国家海岸线数据体系的首要基础成果。新西兰土地信息局（LINZ）目前正推进一项名为“海岸测绘”的长期项目，旨在通过激光雷达（LiDAR）与水深测量（bathymetry）数据获取多套国家海岸线数据集，以此生成平均高高潮位、海图基准面及天文最高潮位等各类海岸线图层。当前项目正聚焦于激光雷达与水深数据的采集工作，待数据采集进度明确后，将敲定新海岸线图层的交付时间表。 使用状态：本数据集于2020年8月基于新西兰土地信息局的水文与地形数据源构建完成，后续将不再以该形式进行维护。待“海岸测绘”项目获取可用数据后，本数据集将由精度更优的新版数据集替代。 数据源与预处理：本空间海岸线数据（比例尺1:50000）源自Topo50系列地形图，该系列中将海岸线定义为以平均高潮位为界的陆地与海洋分界线。原始面状数据已被拆解为线段，以便为每一段海岸线赋予海岸分类属性。海岸分类数据基于新西兰水文局发布的官方电子导航海图。并非所有线段均已分配海岸类别。 如有任何疑问，请通过[e-mail]与我们联系。