Seaweed in the Schleswig-Holstein Wadden Sea 2019-08-21

Aircraft mapping of seagrass meadows since 1991 as part of the Trilateral Monitoring Programme (TMAP). 2 density classes of closed stocks are recorded. The identification of the surfaces from the sports aircraft is only possible from about 25% coverage, Zostera noltii and Z. marina are not distinguished. The results are entered in maps according to the observations, and the positional inaccuracies are greater for remote stocks. Similar, but differing, mappings from 1989 and 1990 are available in the context of ecosystem research in Schleswig-Holstein's Wadden Sea.  Examination: Examination Description of the Examination: Situational comparison with other cartographic data, e.g. nautical charts of the BSH Assessment of the situation本数据集为1991年起作为三边监测计划（Trilateral Monitoring Programme, TMAP）组成部分所开展的海草床航空测绘成果。本次测绘记录了2类密度等级的闭合海草种群。通过轻型通用航空器开展的地表识别仅在海草盖度约25%及以上时可行，且未区分矮大叶藻（Zostera noltii）与大叶藻（Zostera marina，缩写为Z. marina）。测绘结果依据实地观测标注于地图中，且偏远海草种群的位置精度误差相对更大。 1989年与1990年开展的同类（但存在差异）测绘数据，可在石勒苏益格-荷尔斯泰因州瓦登海的生态系统研究项目中获取。 ■ 核查说明：核查方式为与其他制图数据（如德国联邦海事与水文局（BSH）的海图）开展情境比对，并进行现状评估。