let viewer = new Cesium.Viewer("viewerContainer")

    let measure = new Cesium.Measure(viewer)

    // 空间距离
    measure.drawLineMeasureGraphics({ clampToGround: clampToGround, callback: () => { } });

    // 空间面积
    measure.drawAreaMeasureGraphics({ clampToGround: clampToGround, callback: () => { } });

    // 三维量测
    measure.drawTrianglesMeasureGraphics({ callback: () => { } });

    // 清除
    measure._drawLayer.entities.removeAll();