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Prepare land and ocean map background

In this section we load a texture to annotate the land and ocean background for HD(CP)² NARVAL II simulation data over the Tropical Atlantic.

Area:  HD(CP)² NARVAL II study area – Tropical Atlantic (DOM01)

Data directory: /work/kv0653/ParaView-Workshop/HDCP2_NARVAL/
Data file: Dom1_Surface.vtu
Colormap: color_surface.json


1.    Load texture background (see Fig. 1 for result)

  • File -> Open… -> Dom1_Surface.vtu
  • Press OK
  • Press Apply

2.    Change the colormap

  • Click on the choose preset button in the Coloring section of the Dom1_Surface.vtu
  • Click on Import
  • Navigate to color_surface.json (see Fig. 2)
  • Click on OK
  • Press Apply
  • Click on Close


Surface texture for HD(CP)² Narval II applied

Figure 1: Surface texture for HD(CP)² Narval II simulations applied and choose preset button

Path to color_surface.json

Figure 2: Path to color_surface.json

The result is displayed in Fig. 3.

As West Africa and Northeastern Brazil look a bit too grayish we suggest editing the color map transfer function by:

3.    Clicking Color Map Edit – either in the toolbar (see Fig. 3) or in the Coloring section
4.    In the Color Map Editor, click on the gear symbol in the Mapping section to enable the advanced options (see
       Fig. 4)
5.    Click on the circular color key in the medium-green part of the colormap and drag the circle to the left
6.    If you like to, double-click in the dark green part of the colormap to create a new color key value (circle) – note
       the new entry in the Color transfer function values table - and drag this circle a bit further to left as well until
       you are satisfied with the land coloring.  

 Colormap color_surface.json applied

Figure 3: Colormap color_surface.json applied with Edit color map button highlighted.

Colormap adjusted

Figure 4: Colormap adjusted by shifting a color key value


Save your project as a state file, e.g. as NARVALII_background.pvsm.

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