Circular arcs draw incorrectly when very large radii are used

Description

When either modifying a circular arc by moving a vertex so that the radius is large, or creating a new circular arc with a large radius, incorrect results of varying severity could display. The most extreme situation is that the map display is corrupted by a permanent artifact that cuts across the extent of the map.

The stored geometry is not affected.

Cause

This is a known problem.

Solution or Workaround