For mapping applications, tiles are loaded to display data. These requests have to be handled carefully, especially when there is a lot of data, because every m

For mapping applications, tiles are loaded to display data. These requests have to be handled carefully, especially when there is a lot of data, because every map movement causes 10s of requests to be fired at once. Their lifecycles have to be managed so they can be cancelled as soon as their result isn't needed (user panned away, or changed zoom level).