e.geometry</a> is a circular arc. In addition that Graduated Panel holds three different Shapes acting as templates for tick marks and a TextBlock
    acting as a template for tick labels.
  </p>
  <p>
    In a Spot Panel with the Graduated Panel scale are an italic TextBlock showing the node identifier and a red elongated diamond "needle" Shape. The needle's
    angle is determined by <code>convertValueToAngle</code>, which finds the point on the Graduated Panel's main path element corresponding to
    <co