AffineTransform origTrans = graphics.getTransform();
AffineTransform topRightTrans = graphics.getTransform();
topRightTrans.translate(mapPixelWidth - EDGE_WIDTH*2, 0);
graphics.setTransform(topRightTrans);
graphics.setColor(Color.white);
graphics.fillRect(0,
0,
EDGE_WIDTH*2,
EDGE_WIDTH*2);
graphics.setColor(Color.black);
graphics.fillOval(EDGE_WIDTH/2+1, EDGE_WIDTH/2+1, EDGE_WIDTH, EDGE_WIDTH);