公告:所有在
2025 年 4 月 15 日之前注册使用 Earth Engine 的非商业项目都必须
验证是否符合非商业性质的资格条件,才能继续使用 Earth Engine。
ee.Geometry.LinearRing.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 |
---|
LinearRing.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 LinearRing object.
var linearRing = ee.Geometry.LinearRing(
[[-122.091, 37.420],
[-122.085, 37.422],
[-122.080, 37.430]]);
// Apply the cutLines method to the LinearRing object.
var linearRingCutLines = linearRing.cutLines({'distances': [10, 100], 'maxError': 1});
// Print the result to the console.
print('linearRing.cutLines(...) =', linearRingCutLines);
// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(linearRing,
{'color': 'black'},
'Geometry [black]: linearRing');
Map.addLayer(linearRingCutLines,
{'color': 'red'},
'Result [red]: linearRing.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 LinearRing object.
linearring = ee.Geometry.LinearRing(
[[-122.091, 37.420], [-122.085, 37.422], [-122.080, 37.430]]
)
# Apply the cutLines method to the LinearRing object.
linearring_cut_lines = linearring.cutLines(distances=[10, 100], maxError=1)
# Print the result.
display('linearring.cutLines(...) =', linearring_cut_lines)
# Display relevant geometries on the map.
m = geemap.Map()
m.set_center(-122.085, 37.422, 15)
m.add_layer(linearring, {'color': 'black'}, 'Geometry [black]: linearring')
m.add_layer(
linearring_cut_lines, {'color': 'red'}, 'Result [red]: linearring.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, dividing them into segments no longer than specified distances.\u003c/p\u003e\n"],["\u003cp\u003eEmploys the \u003ccode\u003ecutLines\u003c/code\u003e method, accepting distances, maximum error tolerance, and projection as parameters.\u003c/p\u003e\n"],["\u003cp\u003eReturns an empty MultiLineString for unsupported geometry types.\u003c/p\u003e\n"],["\u003cp\u003eDistance units for cutting lines are determined by the provided projection or default to meters.\u003c/p\u003e\n"]]],["The `cutLines` method converts LineString, MultiLineString, and LinearRing geometries into a MultiLineString by dividing them into segments based on specified distances. It takes a list of `distances` to define cut points along each line, a `maxError` for reprojection tolerance, and an optional `proj` for projection information. Other geometry types are converted to an empty MultiLineString. The resulting geometry is displayed on a map with a specific color.\n"],null,["# ee.Geometry.LinearRing.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| LinearRing.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 LinearRing object.\nvar linearRing = ee.Geometry.LinearRing(\n [[-122.091, 37.420],\n [-122.085, 37.422],\n [-122.080, 37.430]]);\n\n// Apply the cutLines method to the LinearRing object.\nvar linearRingCutLines = linearRing.cutLines({'distances': [10, 100], 'maxError': 1});\n\n// Print the result to the console.\nprint('linearRing.cutLines(...) =', linearRingCutLines);\n\n// Display relevant geometries on the map.\nMap.setCenter(-122.085, 37.422, 15);\nMap.addLayer(linearRing,\n {'color': 'black'},\n 'Geometry [black]: linearRing');\nMap.addLayer(linearRingCutLines,\n {'color': 'red'},\n 'Result [red]: linearRing.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 LinearRing object.\nlinearring = ee.Geometry.LinearRing(\n [[-122.091, 37.420], [-122.085, 37.422], [-122.080, 37.430]]\n)\n\n# Apply the cutLines method to the LinearRing object.\nlinearring_cut_lines = linearring.cutLines(distances=[10, 100], maxError=1)\n\n# Print the result.\ndisplay('linearring.cutLines(...) =', linearring_cut_lines)\n\n# Display relevant geometries on the map.\nm = geemap.Map()\nm.set_center(-122.085, 37.422, 15)\nm.add_layer(linearring, {'color': 'black'}, 'Geometry [black]: linearring')\nm.add_layer(\n linearring_cut_lines, {'color': 'red'}, 'Result [red]: linearring.cutLines'\n)\nm\n```"]]