Watersurface cover estimates for sodapans and lakes in the Seewinkel region, Austria

Description This upload describes remote-sensing derived water surface estimates for a set of sodapans and lakes in the Seewinkel region in Austria. Pannonic salt steppes and salt marshes (EUNIS code 1530) are among the rarest habitat types in Europe and typically characterized by halophytic vegetation and periodically reoccurring water surface and it is not untypical for them to fall entirely dry during the course of the year.Here a near-daily time series of water surface area was created from pre-processed Sentinel 1 ARD data using VV polarization estimates from all ascending imageries taken between 2015 and the last updated day. The data was corrected for border-noise and despecking. Based on a calibrated threshold (obtained through visual inspection) the water surface area was then identified and extracted within the boundaries of the habitat areas. A shapefile of the extent of sodapans and lakes in the Neusiedl region has been supplied by the Nationalpark Lake Neusiedl - Seewinkel (not shared). Area estimates are in ha unless otherwise stated. The data can be interactively navigated on a small dashboard online:https://martinjung.shinyapps.io/lackenmonitor/ The creation of this data was supported by the INSPIRE project funded under the BiodivERsA BiodivProtect call.数据集说明 本上传文件描述了奥地利塞温克尔（Seewinkel）地区一系列苏打盐碱洼地（sodapan）与湖泊的遥感反演水面估算结果。泛潘诺尼亚盐生草原与盐沼（EUNIS编码1530）是欧洲最为珍稀的生境类型之一，其典型特征为分布盐生植被，且周期性出现水面，在一年内完全干涸并非罕见。 基于2015年至最新更新日期间所有升轨影像的VV极化反演结果，从经过预处理的哨兵1号（Sentinel-1）分析就绪数据（ARD）中生成了近乎每日的水面面积时间序列。该数据已完成边界噪声校正与斑点抑制处理。依托通过目视解译得到的校准阈值，在生境区域的边界范围内识别并提取了水面面积。新锡德尔湖-塞温克尔国家公园（Nationalpark Lake Neusiedl - Seewinkel）提供了新锡德尔地区苏打盐碱洼地与湖泊的范围矢量形状文件（shapefile），该文件未对外共享。除非另有说明，面积估算的单位均为公顷（ha）。 用户可通过在线小型交互式仪表板浏览该数据：https://martinjung.shinyapps.io/lackenmonitor/。本数据集的制作得到了依托BiodivERsA计划BiodivProtect资助项目的INSPIRE项目支持。