Why are colors in my MATLAB map not displayed correctly when using the WORLDMAP function?

I have the following code that I run in Mapping Toolbox 1.2 (R12.1):

mmx = [0.1000    0.1500    0.2000    0.2500    0.3000    0.3500;...

       0.4000    0.4500    0.5000    0.5500    0.6000    0.6500;...

       0.7000    0.7500    0.8000    0.8500    0.9000    0.9500];

refvec = [1/60 90 -180];

worldmap(mmx, refvec)

When the following code is executed, the color raster does not completely cover the map beneath it. There is a small white stripe on the right edge.

Answer 1

[MathWorks Support Team]

This is a bug with the Mapping Toolbox. This error occurs when the western-most longitude value in the maplegend is negative.

To work around this problem, use East-West longitudes in the range 0 to 360 instead of in the range -180 to 180.