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ee.Geometry.MultiLineString.dissolve
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Returns the union of the geometry. This leaves single geometries untouched, and unions multi geometries.
| Usage | Returns | MultiLineString.dissolve(maxError, proj) | Geometry |
| Argument | Type | Details | this: geometry | Geometry | The geometry to union. |
maxError | ErrorMargin, default: null | The maximum amount of error tolerated when performing any necessary reprojection. |
proj | Projection, default: null | If specified, the union will be performed in this projection. Otherwise it will be performed in a spherical coordinate system. |
Examples
Code Editor (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 dissolve method to the MultiLineString object.
var multiLineStringDissolve = multiLineString.dissolve({'maxError': 1});
// Print the result to the console.
print('multiLineString.dissolve(...) =', multiLineStringDissolve);
// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(multiLineString,
{'color': 'black'},
'Geometry [black]: multiLineString');
Map.addLayer(multiLineStringDissolve,
{'color': 'red'},
'Result [red]: multiLineString.dissolve');
Python setup
See the
Python Environment page for information on the Python API and using
geemap for interactive development.
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 dissolve method to the MultiLineString object.
multilinestring_dissolve = multilinestring.dissolve(maxError=1)
# Print the result.
display('multilinestring.dissolve(...) =', multilinestring_dissolve)
# 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(
multilinestring_dissolve,
{'color': 'red'},
'Result [red]: multilinestring.dissolve',
)
m
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Last updated 2023-10-06 UTC.
[null,null,["Last updated 2023-10-06 UTC."],[[["\u003cp\u003eThe \u003ccode\u003edissolve\u003c/code\u003e method returns the geometric union of a geometry, effectively merging the components of Multi geometries like MultiLineStrings into a single, unified geometry.\u003c/p\u003e\n"],["\u003cp\u003eIt leaves single geometries unchanged, only impacting Multi geometries.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003edissolve\u003c/code\u003e can be customized using optional parameters: \u003ccode\u003emaxError\u003c/code\u003e to control the tolerance for reprojection errors and \u003ccode\u003eproj\u003c/code\u003e to specify the projection for the union operation (defaults to spherical if unspecified).\u003c/p\u003e\n"]]],[],null,["# ee.Geometry.MultiLineString.dissolve\n\nReturns the union of the geometry. This leaves single geometries untouched, and unions multi geometries.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|-----------------------------------------------------|----------|\n| MultiLineString.dissolve`(`*maxError* `, `*proj*`)` | Geometry |\n\n| Argument | Type | Details |\n|------------------|----------------------------|--------------------------------------------------------------------------------------------------------------------------------|\n| this: `geometry` | Geometry | The geometry to union. |\n| `maxError` | ErrorMargin, default: null | The maximum amount of error tolerated when performing any necessary reprojection. |\n| `proj` | Projection, default: null | If specified, the union will be performed in this projection. Otherwise it will be performed in a spherical coordinate system. |\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 dissolve method to the MultiLineString object.\nvar multiLineStringDissolve = multiLineString.dissolve({'maxError': 1});\n\n// Print the result to the console.\nprint('multiLineString.dissolve(...) =', multiLineStringDissolve);\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(multiLineStringDissolve,\n {'color': 'red'},\n 'Result [red]: multiLineString.dissolve');\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 dissolve method to the MultiLineString object.\nmultilinestring_dissolve = multilinestring.dissolve(maxError=1)\n\n# Print the result.\ndisplay('multilinestring.dissolve(...) =', multilinestring_dissolve)\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(\n multilinestring_dissolve,\n {'color': 'red'},\n 'Result [red]: multilinestring.dissolve',\n)\nm\n```"]]