ui.Map.getBounds

以度為單位，傳回目前地圖檢視區塊的界線，格式為 [西、南、東、北] 的清單。

用量	傳回
Map.getBounds(asGeoJSON)	GeoJSONGeometry|List<Number>|String

引數	類型	詳細資料
這個：ui.map	ui.Map	ui.Map 執行個體。
asGeoJSON	布林值 (選填)	如果為 true，則會以 GeoJSON 格式傳回地圖界線。

範例

程式碼編輯器 (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());