Google Earth API Samples - Show/Hide Terrain

Relevant Resources:

• KmlLayerRoot Reference
• GEPlugin Reference

Relevant Code Excerpt:

function showTerrain() {
  var layerRoot = ge.getLayerRoot();
  var terrainLayer = layerRoot.getLayerById(ge.LAYER_TERRAIN);
  terrainLayer.setVisibility(true);
  
  // shortcut:
  // layerRoot.enableLayerById(ge.LAYER_TERRAIN, true);
}

function hideTerrain() {
  var layerRoot = ge.getLayerRoot();
  var terrainLayer = layerRoot.getLayerById(ge.LAYER_TERRAIN);
  terrainLayer.setVisibility(false);
  
  // shortcut:
  // layerRoot.enableLayerById(ge.LAYER_TERRAIN, false);
}