Landslide Inventory for Chuuk, Federated States of Micronesia (FSM) 2003 - 2022

Landslides hazards pose a serious threat to people and infrastructure in the Federated States of Micronesia (FSM). To develop a comprehensive understanding of the landslides hazards in FSM, the USGS-USAID Landslide Disaster Assistance Team (LDAT) has put together landslide inventories for each state using satellite imagery.

Mapping was done using RGB satellite imagery from Maxar, Planet Labs, and Google Earth. This inventory is for Chuuk state and covers all available imagery between July 2003 and September 2022. Landslides are dated by a window of occurrence based on the last images before and first image after the occurrence of the landslide. Each event was mapped using a point at the center of the headscarp (points_Chu), and, when possible, affected area polygons (area_Chu), runout lines (runout_Chu), and headscarp lines (headscarp_Chu). Due to the dense vegetation, frequent cloud cover, and poor spatial and temporal resolution of available imagery, it was difficult to map headscarps and runouts for every event. However, headscarp width and runout distance are mapped where possible. The attribute table for points_Chu, contains a visual-based classification of the land use and vegetation, as well as if the event affected streams, buildings, or utilities (for example, roads). Each event is also labeled with a level of confidence for occurrence and location.

Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

密克罗尼西亚联邦（Federated States of Micronesia, FSM）境内的滑坡灾害对当地民众与基础设施构成严重威胁。为全面系统认知该国滑坡灾害形势，美国地质调查局-美国国际开发署滑坡灾害援助小组（Landslide Disaster Assistance Team, LDAT）依托卫星影像为各州编制了滑坡灾害编目。
本次滑坡编目的制图工作采用了Maxar、Planet Labs及谷歌地球（Google Earth）提供的RGB卫星影像。本编目针对楚克州（Chuuk state），涵盖2003年7月至2022年9月期间的全部可用影像数据。滑坡事件的发生时间通过其发生前的最新影像与发生后的最早影像，以时间窗口的方式进行判定。每一处滑坡事件均以滑坡后壁（headscarp）中心点进行点位标注（图层命名为points_Chu）；若条件允许，还会同步绘制受影响区域多边形（area_Chu）、滑动路径线（runout_Chu）及后壁轮廓线（headscarp_Chu）。
受区域内植被茂密、云层频发，且可用影像时空分辨率不足的限制，并非所有滑坡事件都能完整绘制后壁与滑动路径。仅在条件允许的情况下，才会标注滑坡后壁宽度与滑动距离。points_Chu图层的属性表包含基于目视解译得到的土地利用与植被类型信息，同时记录了该滑坡事件是否影响溪流、建筑或公共设施（如道路）。每一处滑坡事件还会标注其发生与定位的置信等级。
本数据集提及的商品、企业或产品名称仅用于描述用途，并不代表美国政府对此类产品的背书。