Announcement: All noncommercial projects registered to use Earth Engine before
April 15, 2025 must
verify noncommercial eligibility to maintain Earth Engine access.
ee.Geometry.BBox.dissolve
Stay organized with collections
Save and categorize content based on your preferences.
Returns the union of the geometry. This leaves single geometries untouched, and unions multi geometries.
| Usage | Returns | BBox.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 BBox object.
var bBox = ee.Geometry.BBox(-122.09, 37.42, -122.08, 37.43);
// Apply the dissolve method to the BBox object.
var bBoxDissolve = bBox.dissolve({'maxError': 1});
// Print the result to the console.
print('bBox.dissolve(...) =', bBoxDissolve);
// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(bBox,
{'color': 'black'},
'Geometry [black]: bBox');
Map.addLayer(bBoxDissolve,
{'color': 'red'},
'Result [red]: bBox.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 BBox object.
bbox = ee.Geometry.BBox(-122.09, 37.42, -122.08, 37.43)
# Apply the dissolve method to the BBox object.
bbox_dissolve = bbox.dissolve(maxError=1)
# Print the result.
display('bbox.dissolve(...) =', bbox_dissolve)
# Display relevant geometries on the map.
m = geemap.Map()
m.set_center(-122.085, 37.422, 15)
m.add_layer(bbox, {'color': 'black'}, 'Geometry [black]: bbox')
m.add_layer(bbox_dissolve, {'color': 'red'}, 'Result [red]: bbox.dissolve')
m
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
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, which is useful for combining multiple geometries into a single one.\u003c/p\u003e\n"],["\u003cp\u003eIt can be applied to both single and multi-geometries, leaving single geometries unchanged.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003edissolve()\u003c/code\u003e accepts optional \u003ccode\u003emaxError\u003c/code\u003e and \u003ccode\u003eproj\u003c/code\u003e parameters to control reprojection during the union process.\u003c/p\u003e\n"],["\u003cp\u003eThis method is particularly valuable for simplifying complex geometries or creating continuous boundaries from fragmented shapes.\u003c/p\u003e\n"]]],["The `dissolve` method unions geometries, leaving single geometries unchanged and operating on multi-geometries. It takes a `geometry` as input, and optionally `maxError` for reprojection tolerance and `proj` for a specific projection. The function returns a `Geometry` object. Examples in JavaScript and Python demonstrate applying `dissolve` to a BBox, setting `maxError` to 1 and visualizing the original and dissolved geometries on a map.\n"],null,["# ee.Geometry.BBox.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| BBox.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 BBox object.\nvar bBox = ee.Geometry.BBox(-122.09, 37.42, -122.08, 37.43);\n\n// Apply the dissolve method to the BBox object.\nvar bBoxDissolve = bBox.dissolve({'maxError': 1});\n\n// Print the result to the console.\nprint('bBox.dissolve(...) =', bBoxDissolve);\n\n// Display relevant geometries on the map.\nMap.setCenter(-122.085, 37.422, 15);\nMap.addLayer(bBox,\n {'color': 'black'},\n 'Geometry [black]: bBox');\nMap.addLayer(bBoxDissolve,\n {'color': 'red'},\n 'Result [red]: bBox.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 BBox object.\nbbox = ee.Geometry.BBox(-122.09, 37.42, -122.08, 37.43)\n\n# Apply the dissolve method to the BBox object.\nbbox_dissolve = bbox.dissolve(maxError=1)\n\n# Print the result.\ndisplay('bbox.dissolve(...) =', bbox_dissolve)\n\n# Display relevant geometries on the map.\nm = geemap.Map()\nm.set_center(-122.085, 37.422, 15)\nm.add_layer(bbox, {'color': 'black'}, 'Geometry [black]: bbox')\nm.add_layer(bbox_dissolve, {'color': 'red'}, 'Result [red]: bbox.dissolve')\nm\n```"]]