Announcement: All noncommercial projects registered to use Earth Engine beforeApril 15, 2025 mustverify noncommercial eligibility to maintain access. If you have not verified by September 26, 2025, your access may be on hold.

ee.Geometry.dissolve

  • TheGeometry.dissolve() method returns the union of a geometry, leaving single geometries untouched and uniting multi-geometries.

  • It accepts optionalmaxError andproj arguments to control the accuracy and projection of the union operation.

  • The method is used to merge overlapping parts of a geometry into a single entity.

  • The result is a new Geometry object representing the dissolved union.

 Returns the union of the geometry. This leaves single geometries untouched, and unions multi geometries.

UsageReturns
Geometry.dissolve(maxError,proj)Geometry
ArgumentTypeDetails
this:geometryGeometryThe geometry to union.
maxErrorErrorMargin, default: nullThe maximum amount of error tolerated when performing any necessary reprojection.
projProjection, default: nullIf 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 Geometry object.vargeometry=ee.Geometry({'type':'Polygon','coordinates':[[[-122.081,37.417],[-122.086,37.421],[-122.084,37.418],[-122.089,37.416]]]});// Apply the dissolve method to the Geometry object.vargeometryDissolve=geometry.dissolve({'maxError':1});// Print the result to the console.print('geometry.dissolve(...) =',geometryDissolve);// Display relevant geometries on the map.Map.setCenter(-122.085,37.422,15);Map.addLayer(geometry,{'color':'black'},'Geometry [black]: geometry');Map.addLayer(geometryDissolve,{'color':'red'},'Result [red]: geometry.dissolve');

Python setup

See the Python Environment page for information on the Python API and usinggeemap for interactive development.

importeeimportgeemap.coreasgeemap

Colab (Python)

# Define a Geometry object.geometry=ee.Geometry({'type':'Polygon','coordinates':[[[-122.081,37.417],[-122.086,37.421],[-122.084,37.418],[-122.089,37.416],]],})# Apply the dissolve method to the Geometry object.geometry_dissolve=geometry.dissolve(maxError=1)# Print the result.display('geometry.dissolve(...) =',geometry_dissolve)# Display relevant geometries on the map.m=geemap.Map()m.set_center(-122.085,37.422,15)m.add_layer(geometry,{'color':'black'},'Geometry [black]: geometry')m.add_layer(geometry_dissolve,{'color':'red'},'Result [red]: geometry.dissolve')m

Except as otherwise noted, the content of this page is licensed under theCreative Commons Attribution 4.0 License, and code samples are licensed under theApache 2.0 License. For details, see theGoogle Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2023-10-06 UTC.