High Coastal Tsunami Hazard Overlay - Proposed District Plan (PDP)

Intended Purpose: Polygon dataset of areas affected by Tsunami Hazard Overlay (part of the Coastal Hazard Overlay) created for the Wellington City Council District Plan as part of the District Plan Review Process. This layer is part of the Proposed District Plan. Abbreviations/Acronyms: DP - District Plan ePlan - "Electronic Plan" the web version of the District Plan. Data Security: Public, data that can be freely shared and accessed without restrictions. Refresh Rate (Data only): Static. Ownership: This data is owned by WCC District Planning Team, contact [e-mail] for questions about this layer and its appropriate use cases. Ownership specifies legal or administrative control over the content. Stewardship: This data is maintained by WCC City Insights Team, contact [e-mail] for information about the creation of this layer and its maintenance. Stewardship addresses the ongoing care, maintenance, and management of the content. Custodianship: This data is stored on WCC's ArcGIS Online environment, administered by the Spatial Systems Team. Authoratative Data Sources (Data only): GNS modelled tsunami hazard for the Wellington City council (Burbridge et al. 2021) and provided coastal tsunami hazard maps for the Proposed District Plan. Further data changes were made as part of the District Plan Review Process. Summary of Data Collection (Data only): 0.05m was considered to be the limit of acceptable nuisance flooding that could be managed by existing stormwater controls. Water depths of less than 0.05m were removed from Burbridge et al. 2021 modelled data, and the output raster data smoothed to create the Coastal Tsunami Hazard Overlay. All post-processing of raster data for layers is consistent with methodology used for the WCC Proposed District Plan.用途说明：本数据集为惠灵顿市议会（Wellington City Council，简称WCC）区域规划审查流程所制作的海啸灾害叠加区（海岸灾害叠加区的一部分）多边形数据集，属于拟议区域规划的组成图层。 缩写说明：DP——区域规划（District Plan）；ePlan——电子规划（Electronic Plan），即区域规划的网页版。 数据开放属性：公开数据，可无限制自由共享与访问。 数据更新频率（仅数据内容）：静态数据，无周期性更新。 所有权归属：本数据归WCC区域规划团队所有，有关本图层及其合理使用场景的疑问，请联系邮箱[e-mail]。所有权指对内容的合法或行政管控权。 运维管理：本数据由WCC城市洞察团队负责维护，有关本图层的创建与运维信息，请联系邮箱[e-mail]。运维管理指对内容的持续管护、运维与管理工作。 存储托管：本数据存储于WCC的ArcGIS Online环境中，由空间系统团队负责管理。 权威数据源（仅数据部分）：采用GNS为惠灵顿市议会建模的海啸灾害数据（Burbridge等人，2021年），并为拟议区域规划提供了海岸海啸灾害地图。后续在区域规划审查流程中对数据进行了进一步调整。 数据采集概要（仅数据部分）：本次处理将0.05米视为可通过现有雨水管控系统管理的可接受轻度积水阈值。移除Burbridge等人2021年建模数据中水深小于0.05米的区域，并对输出的栅格数据进行平滑处理，以生成海岸海啸灾害叠加图层。所有图层的栅格数据后处理流程均符合WCC拟议区域规划所采用的方法标准。