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ee.Join.saveBest
使用集合让一切井井有条
根据您的偏好保存内容并对其进行分类。
返回一个联接，该联接将第一个集合中的每个元素与第二个集合中的匹配元素配对。具有最佳联接度量的匹配项会作为附加属性添加到每个结果中。当 withinDistance 或 maxDifference 过滤条件用作联接条件时，系统会生成联接度量。
| 用法 | 返回 |
|---|
ee.Join.saveBest(matchKey, measureKey, outer) | 加入 |
| 参数 | 类型 | 详细信息 |
|---|
matchKey | 字符串 | 用于保存比赛的键。 |
measureKey | 字符串 | 用于保存匹配联接条件衡量标准的键。 |
outer | 布尔值，默认值：false | 如果为 true，则结果中将包含没有匹配项的主行。 |
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最后更新时间 (UTC)：2025-07-26。
[null,null,["最后更新时间 (UTC)：2025-07-26。"],[[["\u003cp\u003eThe \u003ccode\u003esaveBest\u003c/code\u003e join pairs elements from two collections based on the best match according to a specified measure.\u003c/p\u003e\n"],["\u003cp\u003eA join measure, like distance or difference, is calculated when using \u003ccode\u003ewithinDistance\u003c/code\u003e or \u003ccode\u003emaxDifference\u003c/code\u003e filters in the join condition.\u003c/p\u003e\n"],["\u003cp\u003eThe best match and its corresponding measure are added as properties to the result using specified keys (\u003ccode\u003ematchKey\u003c/code\u003e, \u003ccode\u003emeasureKey\u003c/code\u003e).\u003c/p\u003e\n"],["\u003cp\u003eOptionally, unmatched primary elements can be included in the output by setting the \u003ccode\u003eouter\u003c/code\u003e parameter to \u003ccode\u003etrue\u003c/code\u003e.\u003c/p\u003e\n"]]],["This describes a join operation that pairs elements from two collections. It identifies the best match between elements based on filters like `withinDistance` or `maxDifference`, storing this match in a specified `matchKey`. The quality of the match is stored under `measureKey`. The `outer` argument determines if unmatched elements from the first collection are included in the output. The function, `ee.Join.saveBest`, returns a join object.\n"],null,["# ee.Join.saveBest\n\nReturns a join that pairs each element from the first collection with a matching element from the second collection. The match with the best join measure is added to each result as an additional property. Join measures are produced when withinDistance or maxDifference filters are used as the join condition.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|-----------------------------------------------------|---------|\n| `ee.Join.saveBest(matchKey, measureKey, `*outer*`)` | Join |\n\n| Argument | Type | Details |\n|--------------|-------------------------|-----------------------------------------------------------------------|\n| `matchKey` | String | The key used to save the match. |\n| `measureKey` | String | The key used to save the measure of the join condition on the match. |\n| `outer` | Boolean, default: false | If true, primary rows without matches will be included in the result. |"]]
