公告:凡是在
2025 年 4 月 15 日前註冊使用 Earth Engine 的非商業專案,都必須
驗證非商業用途資格,才能繼續存取 Earth Engine。
ee.Filter.withinDistance
透過集合功能整理內容
你可以依據偏好儲存及分類內容。
建立一元或二元篩選器,如果左側幾何圖形位於右側幾何圖形的指定距離內,就會通過篩選器。如果做為聯結條件,這個距離會做為聯結測量值。
用量 | 傳回 |
---|
ee.Filter.withinDistance(distance, leftField, rightValue, rightField, leftValue, maxError) | 篩選器 |
引數 | 類型 | 詳細資料 |
---|
distance | 浮點值 | 篩選器傳回 true 的最大距離。 |
leftField | 字串,預設值為空值 | 左運算元的選取器。如果指定了 leftValue,則不應指定。 |
rightValue | 物件,預設值:null | 右側運算元的值。如果指定了 rightField,則不應指定這個欄位。 |
rightField | 字串,預設值為空值 | 右運算元的選取器。如果指定了 rightValue,則不應指定這個值。 |
leftValue | 物件,預設值:null | 左側運算元的值。如果指定了 leftField,則不應指定此屬性。 |
maxError | ErrorMargin (選用) | 篩選器應用程式期間允許的最大重投影錯誤。 |
除非另有註明,否則本頁面中的內容是採用創用 CC 姓名標示 4.0 授權,程式碼範例則為阿帕契 2.0 授權。詳情請參閱《Google Developers 網站政策》。Java 是 Oracle 和/或其關聯企業的註冊商標。
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\u003eDetermines if one geometry lies within a specified distance of another, useful for filtering and spatial joins.\u003c/p\u003e\n"],["\u003cp\u003eOperates on two geometries, allowing specification by field or direct value for both.\u003c/p\u003e\n"],["\u003cp\u003eDistance is a crucial parameter defining the maximum allowable separation for the filter to pass.\u003c/p\u003e\n"],["\u003cp\u003eOffers flexibility with optional error margin control during reprojection.\u003c/p\u003e\n"]]],["This functionality generates a filter based on the proximity of two geometries. It verifies if a left geometry falls within a designated `distance` of a right geometry. The `distance` parameter dictates the threshold for a true result. It accepts parameters such as `leftField`, `rightValue`, `rightField`, `leftValue`, and `maxError`. The filter's operation can be defined via fields or direct values for each geometry. When used in a join, it measures join proximity by the specified `distance`.\n"],null,["# ee.Filter.withinDistance\n\nCreates a unary or binary filter that passes if the left geometry is within a specified distance of the right geometry. If used as a join condition, this distance is used as a join measure.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|----------------------------------------------------------------------------------------------------------------------|---------|\n| `ee.Filter.withinDistance(distance, `*leftField* `, `*rightValue* `, `*rightField* `, `*leftValue* `, `*maxError*`)` | Filter |\n\n| Argument | Type | Details |\n|--------------|-----------------------|---------------------------------------------------------------------------------------|\n| `distance` | Float | The maximum distance for which the filter will return true. |\n| `leftField` | String, default: null | A selector for the left operand. Should not be specified if leftValue is specified. |\n| `rightValue` | Object, default: null | The value of the right operand. Should not be specified if rightField is specified. |\n| `rightField` | String, default: null | A selector for the right operand. Should not be specified if rightValue is specified. |\n| `leftValue` | Object, default: null | The value of the left operand. Should not be specified if leftField is specified. |\n| `maxError` | ErrorMargin, optional | The maximum reprojection error allowed during filter application. |"]]