var points2 = [
new SuperMap.Geometry.Point(-120, 54.142),
new SuperMap.Geometry.Point(-110, 40),
new SuperMap.Geometry.Point(-120, 25.857),
new SuperMap.Geometry.Point(-140, 25.857),
new SuperMap.Geometry.Point(-150, 40),
new SuperMap.Geometry.Point(-140, 54.142)
],
linearRings = new SuperMap.Geometry.LinearRing(points2),
region = new SuperMap.Geometry.Polygon([linearRings]);
let a= region.transform(new SuperMap.Projection("EPSG:4326"),new SuperMap.Projection("EPSG:3857"))
console.log(a,'kkk')