Map of data by country

I have a table with two columns. One is the name of all countries on Earth, the other is a corresponding numeric value. I would like to make a world map with each countries individual face color representing that value. I will attach an example of what I mean. Is there a way to do this?

[Rik]

I know there is a mapping toolbox. Do you have it?

And what have you tried so far?

[Star Strider]

I don’t have the Mapping Toolbox, however I experimented with it in the online Run application, that does. There may be a shape file that defines the country borders as polygons, however if it exists, its existence doesn’t appear to be documented.

.

[Dave B]

It might be worth checking out the borders submission on file exchange, which can do this sort of thing though it might be a little slow to show all countries: https://www.mathworks.com/matlabcentral/fileexchange/50390-borders

Answer 1

[ag]

Hi Brendan,

I understand that you need to make a world map, with individual face colours for each country.

You can explore the “Natural Earth Data” website to get the required data, and then refer the below code, to get a broad idea on how to go ahead with your task,

world = shaperead('ne_110m_land.shp') 
world.BoundingBox 
figure; 
ax = axes; 
col = string({'red', 'green', 'blue', 'cyan', 'magenta', 'yellow', 'black', 'white', 'none'}) 
for i = 1:numel(world) 
    country = world(i); 
    value = randperm(80,1); 
    
    % Set the face color based on the value 
    v = mod(value(1),8)+1; 
    disp(col(v)) 
    faceColor = col(v); 
    
    % Plot the country with the specified face color 
    geoshow(ax, country, 'FaceColor', faceColor); 
    hold on; 
end 
colorbar; 

Please refer to the following resources for more details:

• https://www.naturalearthdata.com/downloads/
• https://www.mathworks.com/help/map/ref/geoshow.html

Hope this helps!

Best Regards,

Aryan Gupta