Fancy frame leaves tiny notches at corners due to lack of connection

[PaulWessel]

Description of the problem

With a fancy frame the outer perimeter is not a polygon but is plotted as 4 straight lines, thus the join settings leave a notch where they meet.

Full script that generated the error

gmt psbasemap -R180/200/-5/5 -JM4i -Baf -P > t.ps

It is only visible when zooming in. Here is an example (see upper left map corner):

The solution is to connect the perimeter segments into a complete polygon before plotting, as is done for plain map frames.

[seisman]

The same issue exists for polar projections. For example:

gmt basemap -JP8.0c -R0/90/0/10 -B0 -pdf map

[PaulWessel]

Thanks, yes a bit tedious to fix but not super-important yet.

[joa-quim]

Yep, too tedious to be addressed.