Adjust the position and orientation of
        the north pointer.

def adjustNorthPointer(self):
        '''Adjust the position and orientation of
        the north pointer.'''
        self.headingNorthText.set_size(self.fontSize) 
        headingRotate = mpl.transforms.Affine2D().rotate_deg_around(0.0,0.0,self.heading)+self.axes.transData
        self.headingNorthText.set_transform(headingRotate)
        if (self.heading > 90) and (self.heading < 270):
            headRot = self.heading-180
        else:
            headRot = self.heading
        self.headingNorthText.set_rotation(headRot)
        self.headingNorthTri.set_transform(headingRotate)
        # Adjust if overlapping with heading pointer
        if (self.heading <= 10.0) or (self.heading >= 350.0):
            self.headingNorthText.set_text('')
        else:
            self.headingNorthText.set_text('N')