Why are map limit and frame limit not aligned when zooming in ?

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Hi, I can't find an answer to a very simple question, using the Mapping Toolbox: why my map and my frame limits are not aligned when I zoom in ? Here is my code, creating a map of the world:
ax = worldmap('World');
setm(ax, 'Origin', [0 25 0], 'FFaceColor',[228, 230, 234]/255)
framem('FlineWidth',1,'FEdgeColor','k')
land = shaperead('landareas', 'UseGeoCoords', true);
geoshow(ax, land, 'FaceColor', [163, 163, 194]/255,'EdgeColor',[133, 133, 173]/255)
Here is what I get, with original scale:
When I try to zoom in, the frame edge is not aligned with the map edge anymore for some obscure reason:
Am I missing something here? I tried to play with tightmap to remove this empty space introduced when zooming, but it has no effect.
Any idea ?
Thanks a bunch!

Accepted Answer

Rylan Dmello
Rylan Dmello on 28 Dec 2016
Edited: Rylan Dmello on 28 Dec 2016
Hello Guillaume, this may be occurring due to the 'Clipping' property on the axes object being set to 'on' by default. Try disabling clipping on the axes:
>> ax.Clipping = 'off';
See the below image for the result of this command with your code:

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