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ee.Geometry.MultiLineString.edgesAreGeodesics
透過集合功能整理內容
你可以依據偏好儲存及分類內容。
如果幾何邊緣 (如有) 是沿著地球球體模型繪製的測地線，則傳回 true；如果為 false，則任何邊緣都是投影中的直線。
| 用量 | 傳回 |
|---|
MultiLineString.edgesAreGeodesics() | 布林值 |
範例
程式碼編輯器 (JavaScript)
// Define a MultiLineString object.
var multiLineString = ee.Geometry.MultiLineString(
[[[-122.088, 37.418], [-122.086, 37.422], [-122.082, 37.418]],
[[-122.087, 37.416], [-122.083, 37.416], [-122.082, 37.419]]]);
// Apply the edgesAreGeodesics method to the MultiLineString object.
var multiLineStringEdgesAreGeodesics = multiLineString.edgesAreGeodesics();
// Print the result to the console.
print('multiLineString.edgesAreGeodesics(...) =', multiLineStringEdgesAreGeodesics);
// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(multiLineString,
{'color': 'black'},
'Geometry [black]: multiLineString');
Python 設定
請參閱
Python 環境頁面，瞭解 Python API 和如何使用 geemap 進行互動式開發。
import ee
import geemap.core as geemap
Colab (Python)
# Define a MultiLineString object.
multilinestring = ee.Geometry.MultiLineString([
[[-122.088, 37.418], [-122.086, 37.422], [-122.082, 37.418]],
[[-122.087, 37.416], [-122.083, 37.416], [-122.082, 37.419]],
])
# Apply the edgesAreGeodesics method to the MultiLineString object.
multilinestring_edges_are_geodesics = multilinestring.edgesAreGeodesics()
# Print the result.
display(
'multilinestring.edgesAreGeodesics(...) =',
multilinestring_edges_are_geodesics,
)
# Display relevant geometries on the map.
m = geemap.Map()
m.set_center(-122.085, 37.422, 15)
m.add_layer(
multilinestring, {'color': 'black'}, 'Geometry [black]: multilinestring'
)
m
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上次更新時間：2025-07-26 (世界標準時間)。
[null,null,["上次更新時間：2025-07-26 (世界標準時間)。"],[[["\u003cp\u003e\u003ccode\u003eedgesAreGeodesics()\u003c/code\u003e is a method used to determine if the edges of a MultiLineString geometry are treated as geodesics (curved along the Earth's surface) or straight lines in the projection.\u003c/p\u003e\n"],["\u003cp\u003eIt returns \u003ccode\u003etrue\u003c/code\u003e if the edges are geodesics and \u003ccode\u003efalse\u003c/code\u003e if they are straight lines.\u003c/p\u003e\n"],["\u003cp\u003eThe method is applied to a MultiLineString geometry object and takes no arguments.\u003c/p\u003e\n"],["\u003cp\u003eThis function is useful for controlling how lines are displayed and analyzed in Earth Engine, especially when dealing with large distances or areas.\u003c/p\u003e\n"]]],["The `edgesAreGeodesics()` method checks if a geometry's edges are geodesics on a spherical Earth model. It takes a geometry as input and returns a boolean value. `True` indicates geodesic edges, while `false` means straight lines in the projection. The examples show how to apply this method to a `MultiLineString` object in both JavaScript and Python, printing the boolean result and visualizing the geometry on a map.\n"],null,["# ee.Geometry.MultiLineString.edgesAreGeodesics\n\nReturns true if the geometry edges, if any, are geodesics along a spherical model of the earth; if false, any edges are straight lines in the projection.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|---------------------------------------|---------|\n| MultiLineString.edgesAreGeodesics`()` | Boolean |\n\n| Argument | Type | Details |\n|------------------|----------|---------|\n| this: `geometry` | Geometry | |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// Define a MultiLineString object.\nvar multiLineString = ee.Geometry.MultiLineString(\n [[[-122.088, 37.418], [-122.086, 37.422], [-122.082, 37.418]],\n [[-122.087, 37.416], [-122.083, 37.416], [-122.082, 37.419]]]);\n\n// Apply the edgesAreGeodesics method to the MultiLineString object.\nvar multiLineStringEdgesAreGeodesics = multiLineString.edgesAreGeodesics();\n\n// Print the result to the console.\nprint('multiLineString.edgesAreGeodesics(...) =', multiLineStringEdgesAreGeodesics);\n\n// Display relevant geometries on the map.\nMap.setCenter(-122.085, 37.422, 15);\nMap.addLayer(multiLineString,\n {'color': 'black'},\n 'Geometry [black]: multiLineString');\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 MultiLineString object.\nmultilinestring = ee.Geometry.MultiLineString([\n [[-122.088, 37.418], [-122.086, 37.422], [-122.082, 37.418]],\n [[-122.087, 37.416], [-122.083, 37.416], [-122.082, 37.419]],\n])\n\n# Apply the edgesAreGeodesics method to the MultiLineString object.\nmultilinestring_edges_are_geodesics = multilinestring.edgesAreGeodesics()\n\n# Print the result.\ndisplay(\n 'multilinestring.edgesAreGeodesics(...) =',\n multilinestring_edges_are_geodesics,\n)\n\n# Display relevant geometries on the map.\nm = geemap.Map()\nm.set_center(-122.085, 37.422, 15)\nm.add_layer(\n multilinestring, {'color': 'black'}, 'Geometry [black]: multilinestring'\n)\nm\n```"]]
