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ee.Geometry.LineString.closestPoint
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返回右侧输入中与左侧输入最接近的点。如果任一输入为空，则返回 null。如果两个输入都是无界限的，则返回任意点。如果一个输入是无界的，则返回有界输入中的任意点。
| 用法 | 返回 |
|---|
LineString.closestPoint(right, maxError, proj) | 对象 |
| 参数 | 类型 | 详细信息 |
|---|
此：left | 几何图形 | 用作运算左操作数的几何图形。 |
right | 几何图形 | 用作相应运算的右操作数的几何图形。 |
maxError | ErrorMargin，默认值：null | 执行任何必要的重新投影时可容忍的最大误差量。 |
proj | 投影，默认值：null | 执行操作的投影。如果未指定，则操作将在球面坐标系中执行，并且球面上的直线距离将以米为单位。 |
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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\u003eReturns the nearest point on the right geometry to the left geometry.\u003c/p\u003e\n"],["\u003cp\u003eReturns null if either input geometry is empty.\u003c/p\u003e\n"],["\u003cp\u003eIf both geometries are unbounded, the function returns an arbitrary point; if only one is unbounded, a point within the bounded geometry is arbitrarily returned.\u003c/p\u003e\n"],["\u003cp\u003eAccepts optional arguments for maximum error tolerance and projection for reprojection during the operation.\u003c/p\u003e\n"]]],["The function `closestPoint` finds the point on the `right` geometry that is nearest to the `left` geometry. It returns `null` if either geometry is empty. For unbounded geometries, it returns an arbitrary point; if only one is unbounded, it returns an arbitrary point within the bounded geometry. The operation can be performed with an optional `maxError` tolerance and a specified `proj` projection, defaulting to spherical coordinates and meters.\n"],null,["# ee.Geometry.LineString.closestPoint\n\nReturns the point on the right input that is nearest to the left input. If either input is empty, null is returned. If both inputs are unbounded, an arbitrary point is returned. If one input is unbounded, an arbitrary point in the bounded input is returned.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|-----------------------------------------------------------|---------|\n| LineString.closestPoint`(right, `*maxError* `, `*proj*`)` | Object |\n\n| Argument | Type | Details |\n|--------------|----------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| this: `left` | Geometry | The geometry used as the left operand of the operation. |\n| `right` | Geometry | The geometry used as the right operand of the operation. |\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. |"]]
