Centers the map view on a given object.
Caution: providing a large or complex collection as input can result in poor performance. Collating the geometry of collections does not scale well; use the smallest collection (or geometry) that is required to achieve the desired outcome.
Returns the map.
Usage Returns Map.centerObject(object, zoom , onComplete )
ui.Map
Argument Type Details object
Element|Geometry An object to center on - a geometry, image or feature. zoom
Number, optional The zoom level, from 0 to 24. If unspecified, computed based on the object's bounding box. onComplete
Function, optional A callback which is triggered after the recentering completes successfully. Passing this parameter causes the
`centerObject` operation to run asynchronously.
Examples
Code Editor (JavaScript)
// The default map in the Code Editor is a built-in ui.Map object called "Map".
// Let's refer to it as "defaultMap" for clarity.
var defaultMap = Map;
// ui.Map objects can be constructed. Here, a new map is declared.
var newMap = ui.Map({
center: {lat: 0, lon: 0, zoom: 1},
style: {position: 'bottom-right', width: '400px'}
});
// Add the newMap to the defaultMap.
defaultMap.add(newMap);
// You can set the viewport of a ui.Map to be centered on an object.
// Here, the defaultMap is centered on a point with a selected zoom level.
var geom = ee.Geometry.Point(-122.0841, 37.4223);
defaultMap.centerObject(geom, 18);
defaultMap.addLayer(geom, {color: 'orange'}, 'Googleplex');
// Map extent can be fetched using the ui.Map.getBounds method.
print('defaultMap bounds as a list',
defaultMap.getBounds());
print('defaultMap bounds as a dictionary',
ee.Dictionary.fromLists(['w', 's', 'e', 'n'], defaultMap.getBounds()));
print('defaultMap bounds as GeoJSON',
defaultMap.getBounds({asGeoJSON: true}));
// Map center point can be fetched using the ui.Map.getCenter method.
print('defaultMap center as a Point geometry', defaultMap.getCenter());
// Map zoom level can be fetched using the ui.Map.getZoom method.
print('defaultMap zoom level', defaultMap.getZoom());
// Map scale can be fetched using the ui.Map.getScale method.
print('defaultMap approximate pixel scale', defaultMap.getScale());