Image:Sphere with chart.png

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A sphere with the chart mapping the upper hemisphere to a disk.

Created by me using Matlab.

Licensing

Public domain I, the copyright holder of this work, hereby release it into the public domain. This applies worldwide.

In case this is not legally possible:
I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

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Matlab source

clf;
hold on;
colormap([0 0 1; 1 0.2 0.2; 1 0 0; 0 0 0]);

[sx,sy,sz] = sphere(49);
sc = [ ones(24,50); 2*ones(26,50) ];
surf(sx,sy,sz, sc, 'EdgeColor', 'none', 'FaceColor', 'flat', ...
     'FaceLighting', 'phong');

sz2 = 2*ones(50,50);
sc2 = 3*ones(50,50);
surf(sx,sy,sz2, sc2, 'EdgeColor', 'none', 'FaceColor', 'flat', ...
     'FaceLighting', 'phong', 'FaceAlpha', 0.5);

[cx,cy,cz] = cylinder([0.005 0.005]);
cc = 4*ones(size(cx));

surf(cx+1, cy,   2*cz, cc);
surf(cx-1, cy,   2*cz, cc);
surf(cx,   cy+1, 2*cz, cc);
surf(cx,   cy-1, 2*cz, cc);
surf(cx,   cy,   cz+1, cc);

view(3);
camlight left;
axis equal;
axis off;
print -dpng spc_tmp.png
system('convert -trim spc_tmp.png spc.png');

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