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ee.Geometry.cutLines
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。
通过将 LineString、MultiLineString 和 LinearRing 几何图形沿其长度切割成不超过指定距离的部分,将其转换为 MultiLineString。所有其他几何图形类型都将转换为空的 MultiLineString。
用法 | 返回 |
---|
Geometry.cutLines(distances, maxError, proj) | 几何图形 |
参数 | 类型 | 详细信息 |
---|
此:geometry | 几何图形 | 剪切相应几何图形的线条。 |
distances | 列表 | 沿每条 LineString 的距离,用于将该线切割成单独的片段,以指定投影的单位或米为单位(如果未指定投影)。 |
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 | 结果和距离测量的投影,如果未指定,则为 EPSG:4326。 |
示例
代码编辑器 (JavaScript)
// Define a Geometry object.
var geometry = ee.Geometry({
'type': 'Polygon',
'coordinates':
[[[-122.081, 37.417],
[-122.086, 37.421],
[-122.084, 37.418],
[-122.089, 37.416]]]
});
// Apply the cutLines method to the Geometry object.
var geometryCutLines = geometry.cutLines({'distances': [10, 100], 'maxError': 1});
// Print the result to the console.
print('geometry.cutLines(...) =', geometryCutLines);
// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(geometry,
{'color': 'black'},
'Geometry [black]: geometry');
Map.addLayer(geometryCutLines,
{'color': 'red'},
'Result [red]: geometry.cutLines');
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 Geometry object.
geometry = ee.Geometry({
'type': 'Polygon',
'coordinates': [[
[-122.081, 37.417],
[-122.086, 37.421],
[-122.084, 37.418],
[-122.089, 37.416],
]],
})
# Apply the cutLines method to the Geometry object.
geometry_cut_lines = geometry.cutLines(distances=[10, 100], maxError=1)
# Print the result.
display('geometry.cutLines(...) =', geometry_cut_lines)
# Display relevant geometries on the map.
m = geemap.Map()
m.set_center(-122.085, 37.422, 15)
m.add_layer(geometry, {'color': 'black'}, 'Geometry [black]: geometry')
m.add_layer(
geometry_cut_lines, {'color': 'red'}, 'Result [red]: geometry.cutLines'
)
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\u003eConverts LineString, MultiLineString, and LinearRing geometries into a MultiLineString by cutting them into segments of specified lengths.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003ecutLines\u003c/code\u003e method accepts distances for segmentation, an optional maximum error tolerance for reprojection, and an optional projection for distance measurements.\u003c/p\u003e\n"],["\u003cp\u003eGeometries other than LineString, MultiLineString, and LinearRing will be transformed into an empty MultiLineString.\u003c/p\u003e\n"],["\u003cp\u003eSegmentation distances are measured in the units of the provided projection or meters if no projection is specified.\u003c/p\u003e\n"]]],[],null,["# ee.Geometry.cutLines\n\nConverts LineString, MultiLineString, and LinearRing geometries into a MultiLineString by cutting them into parts no longer than the given distance along their length. All other geometry types will be converted to an empty MultiLineString.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|---------------------------------------------------------|----------|\n| Geometry.cutLines`(distances, `*maxError* `, `*proj*`)` | Geometry |\n\n| Argument | Type | Details |\n|------------------|----------------------------|----------------------------------------------------------------------------------------------------------------------------------------------|\n| this: `geometry` | Geometry | Cuts the lines of this geometry. |\n| `distances` | List | Distances along each LineString to cut the line into separate pieces, measured in units of the given proj, or meters if proj is unspecified. |\n| `maxError` | ErrorMargin, default: null | The maximum amount of error tolerated when performing any necessary reprojection. |\n| `proj` | Projection, default: null | Projection of the result and distance measurements, or EPSG:4326 if unspecified. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// Define a Geometry object.\nvar geometry = ee.Geometry({\n 'type': 'Polygon',\n 'coordinates':\n [[[-122.081, 37.417],\n [-122.086, 37.421],\n [-122.084, 37.418],\n [-122.089, 37.416]]]\n});\n\n// Apply the cutLines method to the Geometry object.\nvar geometryCutLines = geometry.cutLines({'distances': [10, 100], 'maxError': 1});\n\n// Print the result to the console.\nprint('geometry.cutLines(...) =', geometryCutLines);\n\n// Display relevant geometries on the map.\nMap.setCenter(-122.085, 37.422, 15);\nMap.addLayer(geometry,\n {'color': 'black'},\n 'Geometry [black]: geometry');\nMap.addLayer(geometryCutLines,\n {'color': 'red'},\n 'Result [red]: geometry.cutLines');\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 Geometry object.\ngeometry = ee.Geometry({\n 'type': 'Polygon',\n 'coordinates': [[\n [-122.081, 37.417],\n [-122.086, 37.421],\n [-122.084, 37.418],\n [-122.089, 37.416],\n ]],\n})\n\n# Apply the cutLines method to the Geometry object.\ngeometry_cut_lines = geometry.cutLines(distances=[10, 100], maxError=1)\n\n# Print the result.\ndisplay('geometry.cutLines(...) =', geometry_cut_lines)\n\n# Display relevant geometries on the map.\nm = geemap.Map()\nm.set_center(-122.085, 37.422, 15)\nm.add_layer(geometry, {'color': 'black'}, 'Geometry [black]: geometry')\nm.add_layer(\n geometry_cut_lines, {'color': 'red'}, 'Result [red]: geometry.cutLines'\n)\nm\n```"]]