如何组合两个或多个 am4maps MapPolygonSeries 以便在它们之间叠加 heatRules 数据

如何解决如何组合两个或多个 am4maps MapPolygonSeries 以便在它们之间叠加 heatRules 数据

我有以下两个地图系列，描述了美国各州和加拿大各省，我想找到一种策略，让我的 heatRules 数据在两个系列中均匀应用，基本上是一个 heatrule 跨多个地图系列.. .

let usaSeries = chartRef.current.mapChart.series.push(new am4maps.MappolygonSeries());
usaSeries.geodata = am4geodata_usaLow

usaSeries.heatRules.push({
    "property": "fill","target": usaSeries.mappolygons.template,"min": am4core.color("#ffffff"),"max": am4core.color("#AAAA00"),});

usaSeries.data = heatdata //(statecode,value) 

//Canada
let cadSeries = chartRef.current.mapChart.series.push(new am4maps.MappolygonSeries());
cadSeries.geodata = am4geodata_canadaLow


cadSeries.heatRules.push({
    "property": "fill","target": cadSeries.mappolygons.template,"logarithmic": true
});

cadSeries.data = heatdata //(statecode,value)       

现在它只是创建两个单独的加热规则。有没有办法将这些结合起来然后应用热规则？或其他可用的策略？