Figure 4
Tara Oceans metadata datascape. (a) Graph of the datascape computed on the Tara Oceans metadata dataset (i.e., projected in two dimensions for the sake of visualization using the Fruchterman–Reingold layout algorithm). Each node is a sample colored by ocean province, and edges connect neighbor samples in the datascape. The bold line shows the shortest path (i.e., geodesic) between a point in the western Mediterranean Sea and a point in the Arctic Ocean, both circled in red. (b) The datascape and the geodesic are projected on the planisphere, emphasizing k-nearest-neighbor edges from the datascape graph. Two stations linked on the map are neighbors in the datascape. Colors are proportional to the distance (i.e., the darker lines are smaller distances in the datascape). The map has been created with R version 4.1.2 (https://www.r-project.org/). (c) Zoom on the Mediterranean Sea.
