Copernicus EMS flood activations delimitations (2012 - 2020) rasterised at 30m and aggregated per year and season
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This dataset was created as part of the Geo-harmonizer project, with the scope of making open data easier to access. It contains all the flood activations mapped by the Copernicus Emergency Rapid Mapping Service between 2012 and 2020. To obtain these GeoTIFFs, the vector data packages from CEMS were individual downloaded, rasterized and mosaicked per year and season, resampled at 30-m and reprojected to EPSG 3035: ETRS89-extended / LAEA Europe. If no CEMS flood activation was identified in a specific year and season, the raster was not created. The rasters are provided as COG files, type=16Int, the flooded area pixels have value 100, nodata value is 255. To allow an easier and faster search through all 2012 - 2020 CEMS flood activations, we have prepared a point vector layer (geojson) containing one point for each flood activation area of interest with the following attributes attached: CEMS identification number <ems_id>, area of interest defined by CEMS <ems_aoi>, URL link to the CEMS activation <ems_link>, year of the event <year_start>, <year_end> , <season> and the name of the <geo_harmonizer_raster> where the 30m rasterised delimitations of the flooded areas of the corresponding flood activation can be found. For any additional questions regarding the data, please contact the author at codrina.ilie[at]terrasigna.com. The Copernicus Emergency Rapid Mapping Service data access policy is available here.
本数据集系Geo-harmonizer项目的研发成果，旨在提升开放数据的可及性。其涵盖2012年至2020年间哥白尼紧急快速测绘服务（Copernicus Emergency Rapid Mapping Service，以下简称CEMS）所测绘的全部洪水应急激活事件。为获取对应的地理标记图像文件格式（GeoTIFF）数据，研究人员先单独下载CEMS提供的矢量数据包，再按年度与季候分别完成栅格化与镶嵌处理，随后将分辨率重采样至30米，并投影至EPSG 3035坐标系：ETRS89扩展/欧洲Lambert等面积投影（LAEA Europe）。若某一年度或季候未识别到CEMS洪水应急激活事件，则不生成对应栅格文件。本次发布的栅格文件采用云优化GeoTIFF（Cloud Optimized GeoTIFF，COG）格式，数据类型为16位整型，淹没区域像素值设为100，无数据值为255。为便于用户快速检索2012-2020年全部CEMS洪水应急激活事件，我们额外制作了一个点矢量图层（GeoJSON格式），每个点对应一处感兴趣的洪水应急激活区域，并附带以下属性字段：CEMS识别编号<ems_id>、CEMS划定的感兴趣区域<ems_aoi>、CEMS应急活动链接<ems_link>、事件起始年份<year_start>、事件结束年份<year_end>、季候<season>，以及存储对应洪水应急激活区域30米栅格化淹没范围的<geo_harmonizer_raster>文件名。若您有任何关于本数据集的其他疑问，请联系作者：codrina.ilie[at]terrasigna.com。哥白尼紧急快速测绘服务的数据访问政策可在此处查阅。
