How to force contour values in geoshow - rainfall in Australia

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Peter 2020-5-24

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/531733-how-to-force-contour-values-in-geoshow-rainfall-in-australia

This is probably a very simple question. I have plotted a dataset (rainfall) using geoshow with a color bar. I'm trying to compare it with the official dataset via their output and so I want to plot contour lines so I can see if there is a discrepancy. None of the Matlab help seems to cover this, I probably just need to understand some generic idea about map plots, but I don't..

Here is my simple filled colorbar map, where GP2a is the GPCP rainfall dataset, extracted from their .nc file:

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worldmap('Australia');

load coastlines.mat

geoshow(coastlat,coastlon,'Color','k', 'linewidth', 1.5);

geoshow(Lat, Long, flipud(GP2a'), 'DisplayType','surface')

colormap (flipud(parula))

colorbar

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This works fine.

Now I try contours - all good:

geoshow(Lat, Long, flipud(GP2a'), 'DisplayType','contour')