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ee.Geometry.BBox.convexHull
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。
返回给定几何图形的凸包。单个点的凸包是该点本身，共线点的凸包是一条线，而其他任何点的凸包都是一个多边形。请注意，如果退化多边形的所有顶点都位于同一条直线上，则会生成线段。
| 用法 | 返回 |
|---|
BBox.convexHull(maxError, proj) | 几何图形 |
| 参数 | 类型 | 详细信息 |
|---|
此：geometry | 几何图形 | 计算相应几何图形的凸包。 |
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。 |
示例
代码编辑器 (JavaScript)
// Define a BBox object.
var bBox = ee.Geometry.BBox(-122.09, 37.42, -122.08, 37.43);
// Apply the convexHull method to the BBox object.
var bBoxConvexHull = bBox.convexHull({'maxError': 1});
// Print the result to the console.
print('bBox.convexHull(...) =', bBoxConvexHull);
// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(bBox,
{'color': 'black'},
'Geometry [black]: bBox');
Map.addLayer(bBoxConvexHull,
{'color': 'red'},
'Result [red]: bBox.convexHull');
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 BBox object.
bbox = ee.Geometry.BBox(-122.09, 37.42, -122.08, 37.43)
# Apply the convexHull method to the BBox object.
bbox_convex_hull = bbox.convexHull(maxError=1)
# Print the result.
display('bbox.convexHull(...) =', bbox_convex_hull)
# Display relevant geometries on the map.
m = geemap.Map()
m.set_center(-122.085, 37.422, 15)
m.add_layer(bbox, {'color': 'black'}, 'Geometry [black]: bbox')
m.add_layer(
bbox_convex_hull, {'color': 'red'}, 'Result [red]: bbox.convexHull'
)
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\u003eReturns the smallest convex Geometry that contains all the points in the input Geometry.\u003c/p\u003e\n"],["\u003cp\u003eAccepts optional arguments for maximum error and projection for reprojection.\u003c/p\u003e\n"],["\u003cp\u003eReturns the input Geometry itself if it is a single point or a line.\u003c/p\u003e\n"],["\u003cp\u003eA degenerate polygon with all vertices on the same line will be reduced to a line segment.\u003c/p\u003e\n"],["\u003cp\u003eUseful for finding the outer boundary of a set of points or geometries.\u003c/p\u003e\n"]]],[],null,["# ee.Geometry.BBox.convexHull\n\nReturns the convex hull of the given geometry. The convex hull of a single point is the point itself, the convex hull of collinear points is a line, and the convex hull of everything else is a polygon. Note that a degenerate polygon with all vertices on the same line will result in a line segment.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|--------------------------------------------|----------|\n| BBox.convexHull`(`*maxError* `, `*proj*`)` | Geometry |\n\n| Argument | Type | Details |\n|------------------|----------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| this: `geometry` | Geometry | Calculates the convex hull of this geometry. |\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. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// Define a BBox object.\nvar bBox = ee.Geometry.BBox(-122.09, 37.42, -122.08, 37.43);\n\n// Apply the convexHull method to the BBox object.\nvar bBoxConvexHull = bBox.convexHull({'maxError': 1});\n\n// Print the result to the console.\nprint('bBox.convexHull(...) =', bBoxConvexHull);\n\n// Display relevant geometries on the map.\nMap.setCenter(-122.085, 37.422, 15);\nMap.addLayer(bBox,\n {'color': 'black'},\n 'Geometry [black]: bBox');\nMap.addLayer(bBoxConvexHull,\n {'color': 'red'},\n 'Result [red]: bBox.convexHull');\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 BBox object.\nbbox = ee.Geometry.BBox(-122.09, 37.42, -122.08, 37.43)\n\n# Apply the convexHull method to the BBox object.\nbbox_convex_hull = bbox.convexHull(maxError=1)\n\n# Print the result.\ndisplay('bbox.convexHull(...) =', bbox_convex_hull)\n\n# Display relevant geometries on the map.\nm = geemap.Map()\nm.set_center(-122.085, 37.422, 15)\nm.add_layer(bbox, {'color': 'black'}, 'Geometry [black]: bbox')\nm.add_layer(\n bbox_convex_hull, {'color': 'red'}, 'Result [red]: bbox.convexHull'\n)\nm\n```"]]
