fromWorldBathymetry

// Create Cesium World Bathymetry with default settings
const viewer = new Viewer("cesiumContainer", {
  terrain: fromWorldBathymetry)
});

// Create Cesium World Terrain with normals.
const viewer1 = new Viewer("cesiumContainer", {
  terrain: fromWorldBathymetry({
     requestVertexNormals: true
   });
});

// Handle loading events
const bathymetry = Terrain.fromWorldBathymetry();

scene.setTerrain(bathymetry);

bathymetry.readyEvent.addEventListener(provider => {
  scene.globe.enableLighting = true;

  bathymetry.provider.errorEvent.addEventListener(error => {
    alert(`Encountered an error while loading bathymetric terrain tiles! ${error}`);
  });
});

bathymetry.errorEvent.addEventListener(error => {
  alert(`Encountered an error while creating bathymetric terrain! ${error}`);
});