code: public static Image createSquareImage(String id, String location, double horMargin, double verMargin, double d) {
  		return createRectangleImage(id, location, horMargin, verMargin, d, d);
  	}
docs: Creates an {@link Image} with full opacity (new PictureStyle(1)).
  horMargin, verMargin and diameter are used to create the {@link Bbox}
  @param id is used to create the actual {@link Image} (new Image(id)).
  @param url
  @param horMargin
  @param verMargin
  @param width
  @param height
  @return