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ee.Geometry.MultiPolygon.area
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 |
|---|
MultiPolygon.area(maxError, proj) | 浮点数 |
| 参数 | 类型 | 详细信息 |
|---|
此：geometry | 几何图形 | 几何图形输入。 |
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。 |
示例
代码编辑器 (JavaScript)
// Define a MultiPolygon object.
var multiPolygon = ee.Geometry.MultiPolygon(
[[[[-122.092, 37.424],
[-122.086, 37.418],
[-122.079, 37.425],
[-122.085, 37.423]]],
[[[-122.081, 37.417],
[-122.086, 37.421],
[-122.089, 37.416]]]]);
// Apply the area method to the MultiPolygon object.
var multiPolygonArea = multiPolygon.area({'maxError': 1});
// Print the result to the console.
print('multiPolygon.area(...) =', multiPolygonArea);
// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(multiPolygon,
{'color': 'black'},
'Geometry [black]: multiPolygon');
Python 设置
如需了解 Python API 和如何使用 geemap 进行交互式开发，请参阅
Python 环境页面。
import ee
import geemap.core as geemap
Colab (Python)
# Define a MultiPolygon object.
multipolygon = ee.Geometry.MultiPolygon([
[[
[-122.092, 37.424],
[-122.086, 37.418],
[-122.079, 37.425],
[-122.085, 37.423],
]],
[[[-122.081, 37.417], [-122.086, 37.421], [-122.089, 37.416]]],
])
# Apply the area method to the MultiPolygon object.
multipolygon_area = multipolygon.area(maxError=1)
# Print the result.
display('multipolygon.area(...) =', multipolygon_area)
# Display relevant geometries on the map.
m = geemap.Map()
m.set_center(-122.085, 37.422, 15)
m.add_layer(
multipolygon, {'color': 'black'}, 'Geometry [black]: multipolygon'
)
m
如未另行说明，那么本页面中的内容已根据知识共享署名 4.0 许可获得了许可，并且代码示例已根据 Apache 2.0 许可获得了许可。有关详情，请参阅 Google 开发者网站政策。Java 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC)：2025-07-26。
[null,null,["最后更新时间 (UTC)：2025-07-26。"],[[["\u003cp\u003e\u003ccode\u003earea()\u003c/code\u003e calculates and returns the area of a geometry object.\u003c/p\u003e\n"],["\u003cp\u003ePoints and linestrings have an area of 0, while MultiPolygons sum the area of their parts.\u003c/p\u003e\n"],["\u003cp\u003eThe area can be returned in square meters or in the units of a specified projection.\u003c/p\u003e\n"],["\u003cp\u003eThis function can be applied to a MultiPolygon object using \u003ccode\u003emultiPolygon.area({'maxError': 1})\u003c/code\u003e in JavaScript or \u003ccode\u003emultipolygon.area(maxError=1)\u003c/code\u003e in Python.\u003c/p\u003e\n"]]],["The `area` method calculates the area of a geometry, returning a float. Points and line strings have an area of 0. Multi-geometry areas are the sum of their components' areas, counting intersections multiple times. Users can specify `maxError` for reprojection tolerance and `proj` for custom units; otherwise, the result defaults to square meters. The method is demonstrated in both Javascript and Python using a `MultiPolygon` example.\n"],null,["# ee.Geometry.MultiPolygon.area\n\nReturns the area of the 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| MultiPolygon.area`(`*maxError* `, `*proj*`)` | Float |\n\n| Argument | Type | Details |\n|------------------|----------------------------|-----------------------------------------------------------------------------------------------------------------------------------|\n| this: `geometry` | Geometry | The geometry input. |\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. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// Define a MultiPolygon object.\nvar multiPolygon = ee.Geometry.MultiPolygon(\n [[[[-122.092, 37.424],\n [-122.086, 37.418],\n [-122.079, 37.425],\n [-122.085, 37.423]]],\n [[[-122.081, 37.417],\n [-122.086, 37.421],\n [-122.089, 37.416]]]]);\n\n// Apply the area method to the MultiPolygon object.\nvar multiPolygonArea = multiPolygon.area({'maxError': 1});\n\n// Print the result to the console.\nprint('multiPolygon.area(...) =', multiPolygonArea);\n\n// Display relevant geometries on the map.\nMap.setCenter(-122.085, 37.422, 15);\nMap.addLayer(multiPolygon,\n {'color': 'black'},\n 'Geometry [black]: multiPolygon');\n```\nPython setup\n\nSee the [Python Environment](/earth-engine/guides/python_install) page for information on the Python API and using\n`geemap` for interactive development. \n\n```python\nimport ee\nimport geemap.core as geemap\n```\n\n### Colab (Python)\n\n```python\n# Define a MultiPolygon object.\nmultipolygon = ee.Geometry.MultiPolygon([\n [[\n [-122.092, 37.424],\n [-122.086, 37.418],\n [-122.079, 37.425],\n [-122.085, 37.423],\n ]],\n [[[-122.081, 37.417], [-122.086, 37.421], [-122.089, 37.416]]],\n])\n\n# Apply the area method to the MultiPolygon object.\nmultipolygon_area = multipolygon.area(maxError=1)\n\n# Print the result.\ndisplay('multipolygon.area(...) =', multipolygon_area)\n\n# Display relevant geometries on the map.\nm = geemap.Map()\nm.set_center(-122.085, 37.422, 15)\nm.add_layer(\n multipolygon, {'color': 'black'}, 'Geometry [black]: multipolygon'\n)\nm\n```"]]
