An imperative function that returns a mapid via a synchronous AJAX call.

This mosaics the collection to a single image and return a mapid suitable for building a Google Maps overlay.

Returns returns a mapid and optional token, which may be passed to or ui.Map.addLayer. Undefined if a callback was specified.

ImageCollection.getMap(visParams, callback)MapId|Object
this: imagecollectionImageCollectionThe ImageCollection instance.
visParamsObject, optionalThe visualization parameters.
callbackFunction, optionalAn async callback. If not supplied, the call is made synchronously.