ayer = new ElementOverlay(view.canvas, bounds).addTo(map)
            // const modelLayer = new ElementOverlay(view.canvas, gis.bbox2bounds(bbox)).addTo(map)

            if (!anim) {
                anim = new Animator(
                    () => {
                        model.step()
                        view.draw()
                        // gui.update()
                        if (model.done) anim.stop()
                        // if (model.done) {
                        //     anim.stop()
          