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ee.Feature.area
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返回地图项默认几何图形的面积。点和线串的面积为 0，而多重几何图形的面积是其组成部分的面积之和（相交的面积会多次计算）。
| 用法 | 返回 |
|---|
Feature.area(maxError, proj) | 浮点数 |
| 参数 | 类型 | 详细信息 |
|---|
此：feature | 元素 | 从中获取几何图形的要素。 |
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 | 如果指定，结果将采用相应投影的坐标系的单位。否则将以平方米为单位。 |
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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\u003eThe \u003ccode\u003earea()\u003c/code\u003e function calculates and returns the area of a feature's geometry.\u003c/p\u003e\n"],["\u003cp\u003ePoints and line strings have an area of 0, while the area of multi-geometries is the sum of their component areas.\u003c/p\u003e\n"],["\u003cp\u003eThe returned area is in square meters by default, but can be calculated in the units of a specified projection.\u003c/p\u003e\n"],["\u003cp\u003eYou can specify a maximum error tolerance for reprojection during area calculation.\u003c/p\u003e\n"]]],["The function calculates the area of a feature's default geometry, returning a float value. Point and line string geometries return an area of 0, while multi-geometries return the sum of their component areas. The `maxError` argument controls reprojection error tolerance, and `proj` specifies the output projection; otherwise, the area is returned in square meters. The function takes a feature element as the primary input.\n"],null,["# ee.Feature.area\n\nReturns the area of the feature's default geometry. Area of points and line strings is 0 and the area of multi geometries is the sum of the areas of their components (intersecting areas are counted multiple times).\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|-----------------------------------------|---------|\n| Feature.area`(`*maxError* `, `*proj*`)` | Float |\n\n| Argument | Type | Details |\n|-----------------|----------------------------|-----------------------------------------------------------------------------------------------------------------------------------|\n| this: `feature` | Element | The feature from which the geometry is taken. |\n| `maxError` | ErrorMargin, default: null | The maximum amount of error tolerated when performing any necessary reprojection. |\n| `proj` | Projection, default: null | If specified, the result will be in the units of the coordinate system of this projection. Otherwise it will be in square meters. |"]]
