Medium 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 Proposed District Plan as part of the District Plan Review Process. Abbreviations/Acronyms: DP - District Plan PDP - Proposed 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.数据集用途：本数据集为惠灵顿市议会（Wellington City Council，简称WCC）《拟议分区规划》（Proposed District Plan）制作的海啸灾害覆盖区（属于海岸灾害覆盖体系的一部分）多边形数据集，作为分区规划审查流程的组成部分。 缩写说明：DP——分区规划（District Plan），PDP——拟议分区规划（Proposed District Plan），ePlan——电子规划图（"Electronic Plan"），即分区规划的网页版本。 数据安全属性：公开数据，可无限制自由共享与获取。 数据更新频率：静态数据。 所有权：本数据归WCC分区规划团队所有，如需咨询该图层及其适用场景，请联系邮箱[e-mail]。此处所有权指对内容的合法或行政管控权。 数据管护：本数据集由WCC城市洞察团队负责维护，如需了解该图层的创建与维护信息，请联系邮箱[e-mail]。数据管护指对内容的持续维护、管理与运营。 数据托管：本数据集存储于WCC的ArcGIS Online环境中，由空间系统团队负责管理。 （仅数据部分）权威数据源：用于惠灵顿市议会的GNS海啸灾害模拟数据（Burbridge等人，2021年），该数据为《拟议分区规划》提供了海岸海啸灾害地图。后续数据修改作为分区规划审查流程的一部分完成。 （仅数据部分）数据收集摘要：研究将0.05米确定为现有雨水管控系统可有效应对的滋扰性积水（nuisance flooding）可接受阈值。将Burbridge等人2021年模拟数据中水深不足0.05米的区域移除，并对输出的栅格数据进行平滑处理，以生成海岸海啸灾害覆盖图层。所有图层的栅格数据后处理流程均与WCC《拟议分区规划》所采用的方法论保持一致。