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ee.Feature.union
透過集合功能整理內容
你可以依據偏好儲存及分類內容。
傳回包含兩個特徵幾何聯集的特徵。
| 用量 | 傳回 |
|---|
Feature.union(right, maxError, proj) | 功能 |
| 引數 | 類型 | 詳細資料 |
|---|
這個：left | 元素 | 包含幾何圖形的特徵，用做運算的左側運算元。結果的屬性會從這個物件複製。 |
right | 元素 | 包含幾何的特徵，用做運算的右運算元。系統會忽略這個物件的屬性。 |
maxError | ErrorMargin，預設值：null | 執行任何必要重投影時可容許的最大誤差量。 |
proj | 投影，預設值：null | 執行作業的投影。如未指定，系統會以球面座標系統執行作業，而球面上的線性距離會以公尺為單位。 |
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上次更新時間：2025-07-26 (世界標準時間)。
[null,null,["上次更新時間：2025-07-26 (世界標準時間)。"],[[["\u003cp\u003eComputes a new feature with a geometry that combines the areas of two input features.\u003c/p\u003e\n"],["\u003cp\u003eThe resulting feature inherits properties from the first input feature (\u003ccode\u003eleft\u003c/code\u003e).\u003c/p\u003e\n"],["\u003cp\u003eOptionally, you can specify the projection for the operation and an error margin for reprojection.\u003c/p\u003e\n"],["\u003cp\u003eThe second input feature (\u003ccode\u003eright\u003c/code\u003e) only contributes its geometry to the final result, its properties are discarded.\u003c/p\u003e\n"]]],["The `union` function combines the geometries of two features into a single feature. It takes two features, `left` and `right`, as input. The resulting feature's properties are derived from the `left` feature, while only the geometry is used from the `right` feature. Optional parameters include `maxError`, specifying reprojection error tolerance, and `proj`, defining the projection system; otherwise, a spherical system is used with meter units.\n"],null,["# ee.Feature.union\n\nReturns a feature containing the union of the geometries of two features.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|-------------------------------------------------|---------|\n| Feature.union`(right, `*maxError* `, `*proj*`)` | Feature |\n\n| Argument | Type | Details |\n|--------------|----------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| this: `left` | Element | The feature containing the geometry used as the left operand of the operation. The properties of the result will be copied from this object. |\n| `right` | Element | The feature containing the geometry used as the right operand of the operation. The properties of this object are ignored. |\n| `maxError` | ErrorMargin, default: null | The maximum amount of error tolerated when performing any necessary reprojection. |\n| `proj` | Projection, default: null | The projection in which to perform the operation. If not specified, the operation will be performed in a spherical coordinate system, and linear distances will be in meters on the sphere. |"]]
