Datasets Biodiversa+ Habitat Pilots workshop Flanders - Habitat condition indicators

Rationale These datasets were used during the Datasets Biodiversa+ Habitat Pilots workshop in Flanders (15/10/2025 in the afternoon session) to illustrate the potential and challenges of Sentinel-2 L2A time series to monitor soil moisture and inundated area in grasslands and wetlands. The script to analyse these datasets is provided on GitHub. The NetCDF (Network Common Data Form) (.nc) Sentinel-2 L2A time series data for bands B02, B03, B04, B05, B08, B8A, B11, B12 and SCL, dowloaded from OpenEO with R. The script is provided on GitHub. For the technical documentation of the Sentinel-2 L2A band layers, please visit following websites: https://custom-scripts.sentinel-hub.com/sentinel-2/bands/ https://custom-scripts.sentinel-hub.com/custom-scripts/sentinel-2/scene-classification/ The regions that were used to download the time-series datasets are contained within Demervallei.gpkg. fid=3 is the region of Webbekomsbroek, wherefore three time-series datacubes where retrieved with the script: Period: 2020-01-01 - 2024-12-31: polygon_Demervallei_3.nc Period: 2025-01-01 - 2025-10-06: polygon_Demervallei_new_3.nc Period: 2025-10-06 - 2025-10-13: polygon_Demervallei_last_3.nc Target sites for the field trip Webbekom_5testsites_demo.gpkg: Five target sites within the natural area where selected beforehand (one week before the field visist) based on accessibility (area not to much inundated and the absence of livestock). Survey points collected during the field visits (15/10/2025) Duration: 9am - 12.30 pm survey_points_HabitatPilot.gpkg: Point locations were collected in QField with a smartphone, wereby a hand-held RTK corrected GPS provided centimeter spatial accuracy. Each of the points got one of following labels: Inundated open: this area is inundated and is open (no tall vegetation is hindering the spectral signal to the satellite). Inundated semi: this area is inundated, but tall vegetation like reet and tall grass migh hinder the spectral signal to the satellite. Inundated close: this area is inundated, but tall vegetation is hindering the spectral signal to the satellite. Non-inundated: this area is not inundated. This data layers was used for demonstration purpose (no real statistical validation).数据集编制说明 本数据集用于2025年10月15日下午在佛兰德斯（Flanders）举办的“生物多样性+栖息地试点”数据集研讨会，用于演示哨兵二号L2A级时序数据（Sentinel-2 L2A）在监测草原与湿地土壤湿度及淹没区域方面的应用潜力与挑战。本数据集的分析脚本已上传至GitHub平台。 本数据集采用网络通用数据格式（Network Common Data Form，后缀为.nc），包含通过R语言从开放地球观测平台（OpenEO）获取的哨兵二号L2A级时序数据，涵盖B02、B03、B04、B05、B08、B8A、B11、B12波段及场景分类层（SCL）。相关分析脚本已上传至GitHub平台。 如需查阅哨兵二号L2A级波段图层的技术文档，请访问以下官方网站： https://custom-scripts.sentinel-hub.com/sentinel-2/bands/ https://custom-scripts.sentinel-hub.com/custom-scripts/sentinel-2/scene-classification/ 用于获取时序数据集的研究区域均包含在Demervallei.gpkg文件中。其中要素ID（fid）为3的区域为Webbekomsbroek，通过分析脚本共获取了3个时序数据立方体： 1. 时间范围：2020-01-01 至 2024-12-31：polygon_Demervallei_3.nc 2. 时间范围：2025-01-01 至 2025-10-06：polygon_Demervallei_new_3.nc 3. 时间范围：2025-10-06 至 2025-10-13：polygon_Demervallei_last_3.nc ### 野外考察目标区域 Webbekom_5testsites_demo.gpkg：该文件包含5个预先选定的自然保护区目标点位（于野外考察前一周完成筛选），筛选依据为点位可达性（区域淹没程度较低且无牲畜活动）。 ### 野外考察采集的调查点位 本次野外考察时间为2025年10月15日，时长为上午9:00至12:30。 survey_points_HabitatPilot.gpkg：该文件包含通过智能手机在QField移动端GIS工具中采集的点位坐标，辅以手持实时动态差分（RTK）校正GPS以实现厘米级空间定位精度。每个点位均被赋予以下标签之一： 1. 淹没开阔区：该区域处于淹没状态且无高大植被遮挡卫星光谱信号； 2. 淹没半遮挡区：该区域处于淹没状态，但芦苇、高草等高大植被可能遮挡卫星光谱信号； 3. 淹没全遮挡区：该区域处于淹没状态，且高大植被完全遮挡卫星光谱信号； 4. 非淹没区：该区域未发生淹没。 本数据集图层仅用于演示用途，未开展实际的统计验证工作。