如何在不使用帐户中的地图编辑器的情况下将道路和标签放置在图像叠加层之上？我正在使用非自定义地图，只需要图像上的标签（下面的示例）。我的源代码和覆盖的示例代码
是：
topleftmapbox.on('load', function() {
topleftmapbox.addSource("source_KEWX_REFLECTIVITY_SWEEP0_13", {
"type": "image",
"url": "images/KEWX_Z_SWEEP0_13.gif",
"coordinates": [
[-98.3868664444, 30.062422],
[-97.6698002222,30.062422],
[-97.6698002222, 29.3453557778],
[-98.3868664444, 29.3453557778]
]
})
topleftmapbox.addLayer({
"id": "overlay_KEWX_REFLECTIVITY_SWEEP0_13",
"source": "source_KEWX_REFLECTIVITY_SWEEP0_13",
"type": "raster",
"layout": {"visibility": "none"},
"paint": {
"raster-opacity": 0.99,
}
})
});