您好,您可以参考一下我发的例子
var point = new SuperMap.Geometry.Point(0, 0);
pointFeature = new SuperMap.Feature.Vector(point);
pointFeature.style = {
fillColor: "red",
strokeColor: "yellow",
pointRadius: 7
};
vectorlayer.addFeatures(pointFeature);
var ovm = new SuperMap.Control.OverviewMap({layers:[layer.clone(),vectorlayer.clone()], mapOptions:{allOverlays: true}}); map.addControl(ovm);
map.addLayers([layer, vectorlayer]);