4.3. Make maps using Web Map Service

According to Wikipedia, a Web Map Service (WMS) is a standard protocol for serving georeferenced map images over the Internet.

Ichthyop provides three different WMS for displaying the ocean bathymetry and the cost line as a background of the particle trajectories.

Maps can be intuitively zoomed in and out with the mouse wheel and re-centered doing a mere drag and drop.

Depending on the quality of the Internet connection and how busy is the Web Map Server, the display of the background tiles might take a while or even not work at all. In that case, try again with a distinct WMS and change the zoom scale.

When the settings of the map looks satisfactory, click on “Make maps” button. Ichthyop will create a folder that has exactly the same name than the simulation NetCDF output file (without the .nc extension) in the output directory. Then maps are recorded in this folder as PNG pictures.

Again, depending on the computer capabilities and the number of particles, the map creation might require a large amount of the available dynamic memory and the application looks like it is frozen. Wait for the application to complete this step. Refer to section “Java Heap Space” if the application crashes because of memory problem.