Contour controls in geoshow

Simple question (I hope) for experienced Matlab people. But the Matlab help is no help, at least I've been unable to find it. I think I lack a generic understanding of plot control. There's a bunch of help under: https://au.mathworks.com/help/matlab/contour-plots-1.html and https://au.mathworks.com/help/matlab/ref/contour.html but I can't apply it to maps. Maybe I'm making a mistake. Maybe it's not possible.

Reading Matlab help for contours in general plots I find examples like this:

Z = peaks;

figure

[C,h] = contour(Z,8);

clabel(C,h)

====

Then the contours can be customized, using the handles(? I don't really understand handles) C & h.

But I'm using geoshow. I was doing a color plot:

geoshow(newLat, newLon, pavrainData(:,:,i)', 'DisplayType','surface') % plot % values

colormap (flipud(parula))

colorbar

caxis([camin1 camax1]) % set colorbar axis

====

In that case I have control of the scale using colormap, and caxis and that's working fine. But I want to use contours instead *and* control which contour lines are displayed, e.g 0 50 100 150 200.

1. I tried to grab handles but that doesn't work:

[C,h]=geoshow(newLat, newLon, pavrainData(:,:,i)', 'DisplayType','contour'); % plot % values

clabel(C,h)

2. I tried to include the set contours in the geoshow command (trying similar syntax to the contour command) but that doesn't work:

geoshow(newLat, newLon, pavrainData(:,:,i)', 'DisplayType','contour',[0 50 100 150 200])

Really appreciate if someone can give me guidance - is the first method (ie #1) the correct approach, or the second (#2)? Or another way? And what's the correct syntax?

Basically I just want to plot set contour lines on a map from one variable.

Thanks!

Answer 1

[sid Chen]

you can try

levels = [0 50 100 150 200];

contourm(newLat, newLon, pavrainData(:,:,i)',levels)
% Map is raster
% geoR is GeographicCellsReference

the syntax of contourm is same to contour.

hope that can help you.