思路：图层会随地图缩放，所以创建一个圆，放入自定义渲染层代码实现：引入四个包。这种引入包的方式可以看上一篇（第一次结合proxy）GraphicsLayer,SimpleFillSymbol,Graphic,Circle原作者Graphic=awaitarcgisPackage.Graphic;constCircle=awaitarcgisPackage.Circle;letgraphicCirCle=newGraphicsLayer();varsymbol={color:[255,85,0,0.9],style:"solid",outline:{颜色:[255,85,0,0.9],width:1,},};varcircle=newCircle({center:[i.lon,i.lat],//圆心点坐标为[longitude,latitude]numberOfPoints:80,//沿圆弧的点数geodesic:true,//不考虑地形因素radius:100,//半径单位M});varsfs=newSimpleFillSymbol(symbol);graphicCirCle.add(newGraphic(circle,sfs));map.add(graphicCirCle)
