ee.Geometry.LinearRing.dissolve

AI-generated Key Takeaways

• Returns the union of the geometry, leaving single geometries untouched and uniting multi-geometries.

• Accepts optional maxError and proj parameters to control reprojection during the union operation.

• Can be applied to LinearRing geometries to dissolve them into a single geometry.

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

Usage	Returns
LinearRing.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 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