Physical environment - Modelled depth data (bathymetry plus sea level)

Depth is here bathymetry plus mean sea level. It adds the bathymetry raster to that of mean sea level. Depth is more relevant than bathymetry alone for ecological point of view....水深值为海底水深（bathymetry）与平均海平面（mean sea level）之和。其通过将海底水深栅格数据与平均海平面栅格数据相加得到。从生态学视角而言，水深值相较于单纯的海底水深数据更具参考价值。