An imperative function that returns a map ID and optional token, suitable for generating a Map overlay.
Returns an object which may be passed to ee.data.getTileUrl or ui.Map.addLayer. Undefined if a callback was specified.
| Usage | Returns | Image.getMapId(visParams, callback) | MapId|Object |
| Argument | Type | Details | this: image | Image | The Image instance. |
visParams | ImageVisualizationParameters, optional | The visualization parameters. |
callback | Function, optional | An async callback. If not supplied, the call is made synchronously. |