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

Intended Purpose: Polygon dataset of areas affected by the Coastal Inundation 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): NIWA undertook a coastal hazard and sea level rise assessment (Allis et. al. 2021) for the Proposed District Plan. Further data changes were made as part of the District Plan Review Process. Summary of Data Collection (Data only): The assessment included delineation of the inundation hazard areas within Wellington Harbour, Mākara, and the South Coast of Wellington. 0.05m was considered 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 Allis et. al. 2021 modelled data, and the output raster data smoothed to create the Coastal Inundation Hazard Overlay. All post-processing of raster data layers is consistent with methodology used for the WCC District Plan.数据集用途：本数据集为惠灵顿市议会（Wellington City Council, 简称WCC）拟议分区计划在分区计划审核流程中制作的海岸淹没风险叠加层（属于海岸风险叠加层的一部分）的面要素数据集。 缩写说明：DP——分区计划（District Plan）；PDP——拟议分区计划（Proposed District Plan）；ePlan - "电子计划"，即分区计划的网页版。 数据安全属性：公开数据，可无限制自由共享与访问。 数据更新频率（仅针对数据本体）：静态数据。 所有权归属：本数据由WCC分区规划团队所有，如需咨询该图层及其合理使用场景的相关问题，请发送邮件至[e-mail]。此处的所有权指对内容的合法或行政管控权。 数据管护：本数据由WCC城市洞察团队维护，如需了解该图层的制作与维护相关信息，请发送邮件至[e-mail]。数据管护指对内容的持续看护、维护与管理工作。 数据托管：本数据存储于WCC的ArcGIS Online环境中，由空间系统团队负责管理。 权威数据来源（仅针对数据本体）：NIWA曾为拟议分区计划开展海岸风险与海平面上升评估（Allis et. al. 2021），后续在分区计划审核流程中对数据进行了进一步修改。 数据采集概述（仅针对数据本体）：本次评估划定了惠灵顿港、马卡拉（Mākara）以及惠灵顿南海岸范围内的淹没风险区域。本次评估将0.05米视为可通过现有雨水管控措施管理的可接受轻度积水阈值。研究团队移除了Allis等人2021年模拟数据中水深小于0.05米的区域，并对输出的栅格数据进行平滑处理，以生成海岸淹没风险叠加层。所有栅格数据图层的后处理流程均符合WCC分区计划所采用的方法论。