const height = this.viewer.scene.globe.getHeight(Cesium.Cartographic.fromDegrees(longitude, latitude, 0));
console.log(height); //that value is always wrong and negative?
const height = this.viewer.scene.globe.getHeight(Cesium.Cartographic.fromDegrees(longitude, latitude, 0));
console.log(height); //that value is always wrong and negative?