Установите для свойства loadingScreen анимированного слоя листов пользовательское наложение, которое ничего не отображает. Попробуйте это:
//Define a custom overlay class that inherits from the CustomOverlay class.
MyCustomOverlay.prototype = new Microsoft.Maps.CustomOverlay();
//Define a constructor for the custom overlay class.
function MyCustomOverlay() {
}
MyCustomOverlay.prototype.onAdd = function () {
//Logic to perform when adding overlay to map.
};
MyCustomOverlay.prototype.onLoad = function () {
//Logic to perform after overlay has been added to the map.
};
MyCustomOverlay.prototype.onRemove = function () {
//Logic to perform when overlay has been removed from the map.
};
//Implement the new custom overlay class.
var overlay = new MyCustomOverlay();
var animatedLayer = new Microsoft.Maps.AnimatedTileLayer({ mercator: tileSources, loadingScreen: overlay});
map.layers.insert(animatedLayer);