AI-generated Key Takeaways
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Returns the geometry that represents the portions of two geometries that do not intersect with each other.
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Accepts a Geometry as the right operand and optional
maxError
andproj
parameters for customization. -
Can be applied to MultiPoint geometries to identify areas unique to each input.
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The result is a new Geometry object representing the symmetric difference.
Usage | Returns |
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MultiPoint.symmetricDifference(right, maxError, proj) | Geometry |
Argument | Type | Details |
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this: left | Geometry | The geometry used as the left operand of the operation. |
right | Geometry | The geometry used as the right operand of the operation. |
maxError | ErrorMargin, default: null | The maximum amount of error tolerated when performing any necessary reprojection. |
proj | Projection, default: null | The projection in which to perform the operation. If not specified, the operation will be performed in a spherical coordinate system, and linear distances will be in meters on the sphere. |
Examples
Code Editor (JavaScript)
// Define a MultiPoint object. var multiPoint = ee.Geometry.MultiPoint([[-122.082, 37.420], [-122.081, 37.426]]); // Define other inputs. var inputGeom = ee.Geometry.BBox(-122.085, 37.415, -122.075, 37.425); // Apply the symmetricDifference method to the MultiPoint object. var multiPointSymmetricDifference = multiPoint.symmetricDifference({'right': inputGeom, 'maxError': 1}); // Print the result to the console. print('multiPoint.symmetricDifference(...) =', multiPointSymmetricDifference); // Display relevant geometries on the map. Map.setCenter(-122.085, 37.422, 15); Map.addLayer(multiPoint, {'color': 'black'}, 'Geometry [black]: multiPoint'); Map.addLayer(inputGeom, {'color': 'blue'}, 'Parameter [blue]: inputGeom'); Map.addLayer(multiPointSymmetricDifference, {'color': 'red'}, 'Result [red]: multiPoint.symmetricDifference');
import ee import geemap.core as geemap
Colab (Python)
# Define a MultiPoint object. multipoint = ee.Geometry.MultiPoint([[-122.082, 37.420], [-122.081, 37.426]]) # Define other inputs. input_geom = ee.Geometry.BBox(-122.085, 37.415, -122.075, 37.425) # Apply the symmetricDifference method to the MultiPoint object. multipoint_symmetric_difference = multipoint.symmetricDifference( right=input_geom, maxError=1 ) # Print the result. display( 'multipoint.symmetricDifference(...) =', multipoint_symmetric_difference ) # Display relevant geometries on the map. m = geemap.Map() m.set_center(-122.085, 37.422, 15) m.add_layer(multipoint, {'color': 'black'}, 'Geometry [black]: multipoint') m.add_layer(input_geom, {'color': 'blue'}, 'Parameter [blue]: input_geom') m.add_layer( multipoint_symmetric_difference, {'color': 'red'}, 'Result [red]: multipoint.symmetricDifference', ) m