Announcement: All noncommercial projects registered to use Earth Engine before
April 15, 2025 must
verify noncommercial eligibility to maintain access. If you have not verified by September 26, 2025, your access may be on hold.
ui.Map.onChangeCenter
Stay organized with collections
Save and categorize content based on your preferences.
Registers a callback that's fired when the map center changes. This is fired during pan or when the map's center is changed programmatically.
Returns an ID which can be passed to unlisten() to unregister the callback.
| Usage | Returns | Map.onChangeCenter(callback) | String |
| Argument | Type | Details | this: ui.map | ui.Map | The ui.Map instance. |
callback | Function | The callback to fire when the map center changes. The callback is passed two parameters: an object containing the coordinates of the new center (with keys lon and lat) and the map widget itself. |
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2023-10-06 UTC.
[null,null,["Last updated 2023-10-06 UTC."],[],["The `Map.onChangeCenter` function registers a callback triggered when the map's center changes, either through panning or programmatic updates. It accepts a callback function that receives the new center's coordinates (longitude and latitude) and the map widget itself as parameters. The function returns a unique string ID used to unregister the callback later. This callback is associated with a `ui.Map` instance.\n"]]