1. A method of generating an open area map, the method comprising: obtaining an image of a layout, the layout representing a real-world area in which a person moves about; applying a grid on the image, the grid including tiles that fill in a ground area of the image; and generating a routable map as a function of the grid, wherein the routable map is configured to provide point-to-point routing within the layout as a function of the grid, the point-to-point routing including route calculation not dependent upon one or more predetermined path segments.