Question

I’m trying to plot a counter map over a general map (Asia or US).

Generally speaking (input data is only by example)

% Data Input
long = (:,1); 
lat = (:,2);
z = (:,3);
[x,y] = meshgrid(x,y);
z = x.^2 + y.^2;
[C, h] = contour(x, y, z, 10);
clabel(C,h)

So this where I get stuck. I use world map ‘asia’ but I only see the map and not the contour map over Asia.

Answer 1

Try adding the command hold on after the first plot and before the second plot, and then hold off after the second plot.

This command tells MATLAB to not clear the plot before drawing a new one, the effect being that you can layer multiple plots on top of each other.