If the antipodal point (the point opposite of the map center) is on land,
the corresponding land mass was stretched across the whole map, breaking
the rendering. This was fixed by a couple of changes:
1. A check is done for each polygon whether it contains the antipodal
point.
2. If it does not, render it as a simple polygon as it was previously.
3. If it does contain the antipodal point, create a path that contains:
a) A circle covering the whole map.
b) The polygon with the points in reverse order.
This leads to filled circle with the polygon “cut out”, which is the
correct display in this case.
Thomas Kolb