Litter surveys on 24 beaches of 8 Mediterranean islands (2017-2019)

Surface area was measured with the “Polygon” tool from Google Earth© between the starting and ending coordinates, the back of the beach and the waterline.使用谷歌地球（Google Earth©）的多边形（Polygon）工具，基于起止坐标对海滩后缘与水边线之间的区域进行表面积测量。