MATLAB: Pcolor on map axis

mappcolor

I can successfully create a 'checkerboard' plot using pcolor on a regular axes. What I would like to be able to do is create it on a map axes, so that I can superimpose country borders. Just to be clear, I know how to create a contoured plot (contourfm) on a map axis with the country borders. But I don't want contours in this instance, I want to plot the actual gridboxes (i.e. pcolor on a regular axes). Any advice would be much appreciated.

Best Answer

something similar to pcolorm? I suppose geoshow with displaytype surface or texturemap would work as well.

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MATLAB: Cannot overlay country/state/district borders from shapefile without blocking data

If you just want the outline of the polygons in the shapefile, try:

geoshow(borders, 'facecolor', 'none');

MATLAB: How to insert geographical map under other grid data map

First you need a shapefile. You can find shapefiles on different places on the web. I've found naturalearthdata.com to work great for country borders. I've used the one called "Admin 0 - Boundary lines", so I can vouch for it. Just download the 10MB file and put the unzipped folder in your MATLAB path.

Drawing shapefile:

Borders_shp=shaperead('ne_10m_admin_0_countries.shp')
LandBorders=geoshow(gca,[Borders_shp.Y],[Borders_shp.X],'color',[0.3 0.3 0.3],'linewidth',0.25);

Overlay your data (denoted x & y):

h=geoshow(gca, x,y,'DisplayType', 'multipoint');

or if you want the color of your markers to describe some z-data, use this instead:

scatterm(x,y,[],z)

Set the axes limits already when you create your frame. For example:

axesm('mercator',...
    'FLatLimit',[10 52],...
    'FLonLimit',[120 172])

Best Answer

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MATLAB: Cannot overlay country/state/district borders from shapefile without blocking data

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