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ee.Geometry.MultiLineString.distance
透過集合功能整理內容
你可以依據偏好儲存及分類內容。
傳回兩個幾何圖形之間的最短距離。
用量 | 傳回 |
---|
MultiLineString.distance(right, maxError, proj, spherical) | 浮點值 |
引數 | 類型 | 詳細資料 |
---|
this:left | 幾何圖形 | 用於做為運算左運算元的幾何圖形。 |
right | 幾何圖形 | 用於做為運算右運算元的幾何圖形。 |
maxError | ErrorMargin,預設值:空值 | 執行任何必要的重新投影作業時,可容許的最大誤差值。 |
proj | 投影,預設值:null | 要執行作業的投影。如未指定,系統會在球面座標系統中執行這項作業,而線性距離會以球面上的公尺為單位。 |
spherical | 布林值,預設值為 false | 如果為 true,系統會在單位球上執行計算。如果設為 false,計算結果會是橢圓形,並考量地球扁平度。如果指定 proj,則會略過這項設定。預設值為 false。 |
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]]]);
// Define other inputs.
var inputGeom = ee.Geometry.Point(-122.090, 37.423);
// Apply the distance method to the MultiLineString object.
var multiLineStringDistance = multiLineString.distance({'right': inputGeom, 'maxError': 1});
// Print the result to the console.
print('multiLineString.distance(...) =', multiLineStringDistance);
// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(multiLineString,
{'color': 'black'},
'Geometry [black]: multiLineString');
Map.addLayer(inputGeom,
{'color': 'blue'},
'Parameter [blue]: inputGeom');
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]],
])
# Define other inputs.
input_geom = ee.Geometry.Point(-122.090, 37.423)
# Apply the distance method to the MultiLineString object.
multilinestring_distance = multilinestring.distance(
right=input_geom, maxError=1
)
# Print the result.
display('multilinestring.distance(...) =', multilinestring_distance)
# 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.add_layer(input_geom, {'color': 'blue'}, 'Parameter [blue]: input_geom')
m
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上次更新時間:2025-07-25 (世界標準時間)。
[null,null,["上次更新時間:2025-07-25 (世界標準時間)。"],[[["\u003cp\u003eCalculates the minimum distance between a MultiLineString and another geometry.\u003c/p\u003e\n"],["\u003cp\u003eReturns the distance in meters when the projection is not specified, otherwise uses the specified projection.\u003c/p\u003e\n"],["\u003cp\u003eAccepts an optional \u003ccode\u003emaxError\u003c/code\u003e parameter to control the accuracy of reprojection.\u003c/p\u003e\n"],["\u003cp\u003eThe distance is calculated between the MultiLineString and the nearest point on the input geometry.\u003c/p\u003e\n"]]],[],null,["# ee.Geometry.MultiLineString.distance\n\nReturns the minimum distance between two geometries.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|----------------------------------------------------------------------------|---------|\n| MultiLineString.distance`(right, `*maxError* `, `*proj* `, `*spherical*`)` | Float |\n\n| Argument | Type | Details |\n|--------------|----------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| this: `left` | Geometry | The geometry used as the left operand of the operation. |\n| `right` | Geometry | The geometry used as the right operand of the operation. |\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| `spherical` | Boolean, default: false | If true, the calculation will be done on the unit sphere. If false, the calculation will be elliptical, taking earth flattening into account. Ignored if proj is specified. Default is false. |\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// Define other inputs.\nvar inputGeom = ee.Geometry.Point(-122.090, 37.423);\n\n// Apply the distance method to the MultiLineString object.\nvar multiLineStringDistance = multiLineString.distance({'right': inputGeom, 'maxError': 1});\n\n// Print the result to the console.\nprint('multiLineString.distance(...) =', multiLineStringDistance);\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');\nMap.addLayer(inputGeom,\n {'color': 'blue'},\n 'Parameter [blue]: inputGeom');\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# Define other inputs.\ninput_geom = ee.Geometry.Point(-122.090, 37.423)\n\n# Apply the distance method to the MultiLineString object.\nmultilinestring_distance = multilinestring.distance(\n right=input_geom, maxError=1\n)\n\n# Print the result.\ndisplay('multilinestring.distance(...) =', multilinestring_distance)\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.add_layer(input_geom, {'color': 'blue'}, 'Parameter [blue]: input_geom')\nm\n```"]]