How can I plot a figure only inside the shape ?

For Example:

I ploted this figure:

https://docs.google.com/file/d/0B13-qTmVDpAqQ1AwbHV1U3RsaUE/edit

I used contourf and geoshow to do this. But I need to plot only inside the shape, What is the function to do this ? (if exist!!) How can I do it ?

[Jan]

In which "shape" do you want to plot in?

[Arthur Melo]

So, If you saw the figure, you noticed that have a area delimited and out this area also are plotted (with colors). I need to plot only inside this area (painting only inside this area). Could you help me ?

Answer 1

[alexandre xavier]

See vec2mtx function and use some logical question (e.g. find) to verify if there is overlap between maps.