overviewMapDijit = new esri.dijit.OverviewMap(
{map: mymap,
baseLayer: bLayer,
height: 80,
width: 200},
ovDiv);
}
overviewMapDijit.startup();
Width of the overview map dijit in screen pixels. The default value is 1/4th the width of the map, unless the HTML element referred to by srcNodeRef has a valid size.
.gcviz-overviewMap {
width: 245px!important;
height: 100px!important;
}