ee.Geometry.LinearRing.dissolve

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

  • The method can take optional maxError and proj arguments to control reprojection tolerance and coordinate system.

  • Examples are provided in JavaScript and Python demonstrating how to use the dissolve method on a LinearRing object.

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

UsageReturns
LinearRing.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 LinearRing object.
var linearRing = ee.Geometry.LinearRing(
    [[-122.091, 37.420],
     [-122.085, 37.422],
     [-122.080, 37.430]]);

// Apply the dissolve method to the LinearRing object.
var linearRingDissolve = linearRing.dissolve({'maxError': 1});

// Print the result to the console.
print('linearRing.dissolve(...) =', linearRingDissolve);

// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(linearRing,
             {'color': 'black'},
             'Geometry [black]: linearRing');
Map.addLayer(linearRingDissolve,
             {'color': 'red'},
             'Result [red]: linearRing.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 LinearRing object.
linearring = ee.Geometry.LinearRing(
    [[-122.091, 37.420], [-122.085, 37.422], [-122.080, 37.430]]
)

# Apply the dissolve method to the LinearRing object.
linearring_dissolve = linearring.dissolve(maxError=1)

# Print the result.
display('linearring.dissolve(...) =', linearring_dissolve)

# Display relevant geometries on the map.
m = geemap.Map()
m.set_center(-122.085, 37.422, 15)
m.add_layer(linearring, {'color': 'black'}, 'Geometry [black]: linearring')
m.add_layer(
    linearring_dissolve, {'color': 'red'}, 'Result [red]: linearring.dissolve'
)
m