private var grapbiaozhu:GraphicsLayer=new GraphicsLayer();
grapbiaozhu.clear();
map.addLayer(grapbiaozhu);
var gra:Graphic=new Graphic();
gra.geometry=graphicnew.geometry.extent.center;//取几何图形的中心位置
var content:String=cityName+”:”+String(zbfgzs);//标注的字符串
var tSymbol:TextSymbol = new TextSymbol(content);
tSymbol.textFormat = new TextFormat();
tSymbol.textFormat.size = 15; 字号大小
tSymbol.textFormat.color = 0x000000; 字体颜色
tSymbol.border = false; 边框
tSymbol.borderColor = null; 边框颜色
tSymbol.placement=InfoPlacement.BOTTOM; 信息安放位置
tSymbol.yoffset=0; y偏移
tSymbol.xoffset=0;
gra.symbol=tSymbol;
gra.autoMoveToTop=true;
grapbiaozhu.add(gra);