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ee.Geometry.LineString.dissolve
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Returns the union of the geometry. This leaves single geometries untouched, and unions multi geometries.
| Usage | Returns | LineString.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 LineString object.
var lineString = ee.Geometry.LineString([[-122.09, 37.42], [-122.08, 37.43]]);
// Apply the dissolve method to the LineString object.
var lineStringDissolve = lineString.dissolve({'maxError': 1});
// Print the result to the console.
print('lineString.dissolve(...) =', lineStringDissolve);
// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(lineString,
{'color': 'black'},
'Geometry [black]: lineString');
Map.addLayer(lineStringDissolve,
{'color': 'red'},
'Result [red]: lineString.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 LineString object.
linestring = ee.Geometry.LineString([[-122.09, 37.42], [-122.08, 37.43]])
# Apply the dissolve method to the LineString object.
linestring_dissolve = linestring.dissolve(maxError=1)
# Print the result.
display('linestring.dissolve(...) =', linestring_dissolve)
# 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(
linestring_dissolve, {'color': 'red'}, 'Result [red]: linestring.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 union of a geometry, merging multi-geometries into a single geometry.\u003c/p\u003e\n"],["\u003cp\u003eIt can be used on LineString, LinearString, and other multi-geometries.\u003c/p\u003e\n"],["\u003cp\u003eIt takes optional \u003ccode\u003emaxError\u003c/code\u003e and \u003ccode\u003eproj\u003c/code\u003e parameters for controlling reprojection during the union process.\u003c/p\u003e\n"],["\u003cp\u003eFor single geometries like LineString, \u003ccode\u003edissolve()\u003c/code\u003e essentially returns the original geometry unchanged.\u003c/p\u003e\n"]]],[],null,["# ee.Geometry.LineString.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| LineString.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 LineString object.\nvar lineString = ee.Geometry.LineString([[-122.09, 37.42], [-122.08, 37.43]]);\n\n// Apply the dissolve method to the LineString object.\nvar lineStringDissolve = lineString.dissolve({'maxError': 1});\n\n// Print the result to the console.\nprint('lineString.dissolve(...) =', lineStringDissolve);\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(lineStringDissolve,\n {'color': 'red'},\n 'Result [red]: lineString.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 LineString object.\nlinestring = ee.Geometry.LineString([[-122.09, 37.42], [-122.08, 37.43]])\n\n# Apply the dissolve method to the LineString object.\nlinestring_dissolve = linestring.dissolve(maxError=1)\n\n# Print the result.\ndisplay('linestring.dissolve(...) =', linestring_dissolve)\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(\n linestring_dissolve, {'color': 'red'}, 'Result [red]: linestring.dissolve'\n)\nm\n```"]]