Creating continental outlines


In order to create the continental outlines, you will need a land/sea mask file. A netcdf file called land-sea-mask-v2.nc file is available from NOAA here. Load that file in VisIt and specify the NETCDF file type.

First you'll need to create a contour plot of the "mask" field. Select a Value of "1.0". Specify a single black color for the contour lines. And Uncheck the "Legend" button".

Now, you will need to transform the plot to the correct co-ordinate system. First, create a Transform operator, and specify a scaling of 0.25 both in the X and Y directions.

Next, create a transform operator and translate the plot by -90 in the y direction.

You should end up with a properly normalized 2D plot as shown on the left.