This record is maintained as part of the marine systems collection. Read the documentation before using the files in a new analysis.这条记录属于海洋系统数据集。将文件用于新的分析前，请先阅读相关文档。
Overview
This archive records shoreline positions interpreted from a consistent sequence of satellite scenes. It is designed to reveal broad patterns of retreat, advance and shoreline stability across the north coast.
The archive supports regional comparison and screening. It should not be treated as a cadastral boundary or a substitute for a site survey.
Method
Scenes are filtered for cloud cover, corrected to a common reference and classified using a water-edge workflow. Each position retains its acquisition date, image source and interpretation confidence.
Field guide
| Field | Description |
|---|---|
shoreline_id |
Stable identifier for a shoreline position. |
observed_at |
Acquisition date of the source scene. |
change_rate_m_yr |
Estimated annual shoreline movement. |
confidence |
Interpretation confidence for the position. |
Known limitations
Short-term tides, wave conditions and image quality can influence the extracted line. Use the confidence field and source scene date when interpreting local change.
概览
这份档案从连续的卫星影像中解译海岸线位置，用于呈现北部海岸大范围的后退、前进和稳定模式。
档案适合区域比较和初步筛选，不应被视为地籍边界，也不能替代现场测量。
方法
影像首先根据云量筛选，再校正到统一参考并通过水体边缘流程进行分类。每个位置都保留采集日期、影像来源和解译置信度。
字段指南
| 字段 | 描述 |
|---|---|
shoreline_id |
海岸线位置的稳定标识符。 |
observed_at |
源影像的采集日期。 |
change_rate_m_yr |
估算的年均海岸线移动距离。 |
confidence |
该位置的解译置信度。 |
已知局限
短期潮汐、波浪条件和影像质量都会影响提取的线条。解读局地变化时，请结合置信度字段和源影像日期。
04 / ACCESS REQUEST04 / 数据申请
Request the data.申请数据。
Tell us who you are and how you plan to use this record. Every file in this dataset will be included in the request.请告诉我们你的身份以及使用这条记录的计划。本数据集中的全部文件都会包含在申请中。