def dice(polygon_1,polygon_2):
        """
        Calculate intercept dice for shapely polygons.

        Args:
            polygon_1
            polygon_2

        Returns:
            intercept over union

        """
        area_intersection = polygon_1.intersection(polygon_2).area
        dice = (2*area_intersection)/(polygon_1.area + polygon_2.area) * 100
        return dice