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ee.Geometry.LineString.union
透過集合功能整理內容
你可以依據偏好儲存及分類內容。
傳回兩個幾何圖形的聯集。
用量 | 傳回 |
---|
LineString.union(right, maxError, proj) | 幾何圖形 |
引數 | 類型 | 詳細資料 |
---|
這個:left | 幾何圖形 | 做為運算左運算元的幾何圖形。 |
right | 幾何圖形 | 用做運算右運算元的幾何圖形。 |
maxError | ErrorMargin,預設值:null | 執行任何必要重投影時可容許的最大誤差量。 |
proj | 投影,預設值:null | 執行作業的投影。如未指定,系統會以球面座標系統執行作業,而球面上的線性距離會以公尺為單位。 |
範例
程式碼編輯器 (JavaScript)
// Define a LineString object.
var lineString = ee.Geometry.LineString([[-122.09, 37.42], [-122.08, 37.43]]);
// Define other inputs.
var inputGeom = ee.Geometry.BBox(-122.085, 37.415, -122.075, 37.425);
// Apply the union method to the LineString object.
var lineStringUnion = lineString.union({'right': inputGeom, 'maxError': 1});
// Print the result to the console.
print('lineString.union(...) =', lineStringUnion);
// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(lineString,
{'color': 'black'},
'Geometry [black]: lineString');
Map.addLayer(inputGeom,
{'color': 'blue'},
'Parameter [blue]: inputGeom');
Map.addLayer(lineStringUnion,
{'color': 'red'},
'Result [red]: lineString.union');
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 LineString object.
linestring = ee.Geometry.LineString([[-122.09, 37.42], [-122.08, 37.43]])
# Define other inputs.
input_geom = ee.Geometry.BBox(-122.085, 37.415, -122.075, 37.425)
# Apply the union method to the LineString object.
linestring_union = linestring.union(right=input_geom, maxError=1)
# Print the result.
display('linestring.union(...) =', linestring_union)
# Display relevant geometries on the map.
m = geemap.Map()
m.set_center(-122.085, 37.422, 15)
m.add_layer(linestring, {'color': 'black'}, 'Geometry [black]: linestring')
m.add_layer(input_geom, {'color': 'blue'}, 'Parameter [blue]: input_geom')
m.add_layer(
linestring_union, {'color': 'red'}, 'Result [red]: linestring.union'
)
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\u003eReturns a Geometry representing the union of two geometries.\u003c/p\u003e\n"],["\u003cp\u003eAccepts a right-hand Geometry operand, an optional maximum error margin for reprojection, and an optional projection.\u003c/p\u003e\n"],["\u003cp\u003ePerforms the union operation in spherical coordinates with linear distances in meters on the sphere if no projection is specified.\u003c/p\u003e\n"],["\u003cp\u003eCan be applied to LineString, and likely other Geometry types, to combine with other geometries like bounding boxes.\u003c/p\u003e\n"]]],[],null,["# ee.Geometry.LineString.union\n\nReturns the union of the two geometries.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|----------------------------------------------------|----------|\n| LineString.union`(right, `*maxError* `, `*proj*`)` | Geometry |\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\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// Define a LineString object.\nvar lineString = ee.Geometry.LineString([[-122.09, 37.42], [-122.08, 37.43]]);\n\n// Define other inputs.\nvar inputGeom = ee.Geometry.BBox(-122.085, 37.415, -122.075, 37.425);\n\n// Apply the union method to the LineString object.\nvar lineStringUnion = lineString.union({'right': inputGeom, 'maxError': 1});\n\n// Print the result to the console.\nprint('lineString.union(...) =', lineStringUnion);\n\n// Display relevant geometries on the map.\nMap.setCenter(-122.085, 37.422, 15);\nMap.addLayer(lineString,\n {'color': 'black'},\n 'Geometry [black]: lineString');\nMap.addLayer(inputGeom,\n {'color': 'blue'},\n 'Parameter [blue]: inputGeom');\nMap.addLayer(lineStringUnion,\n {'color': 'red'},\n 'Result [red]: lineString.union');\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 LineString object.\nlinestring = ee.Geometry.LineString([[-122.09, 37.42], [-122.08, 37.43]])\n\n# Define other inputs.\ninput_geom = ee.Geometry.BBox(-122.085, 37.415, -122.075, 37.425)\n\n# Apply the union method to the LineString object.\nlinestring_union = linestring.union(right=input_geom, maxError=1)\n\n# Print the result.\ndisplay('linestring.union(...) =', linestring_union)\n\n# Display relevant geometries on the map.\nm = geemap.Map()\nm.set_center(-122.085, 37.422, 15)\nm.add_layer(linestring, {'color': 'black'}, 'Geometry [black]: linestring')\nm.add_layer(input_geom, {'color': 'blue'}, 'Parameter [blue]: input_geom')\nm.add_layer(\n linestring_union, {'color': 'red'}, 'Result [red]: linestring.union'\n)\nm\n```"]]