ee.Geometry.LineString.symmetricDifference
Returns the symmetric difference between two geometries.
Usage | Returns |
---|
LineString.symmetricDifference(right, maxError, proj) | Geometry |
Argument | Type | Details |
---|
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
// Define a LineString object.
var lineString = ee.Geometry.LineString([[-122.09, 37.42], [-122.08, 37.43]]);
// Define other inputs.
var inputGeom = ee.Geometry.BBox(-122.085, 37.415, -122.075, 37.425);
// Apply the symmetricDifference method to the LineString object.
var lineStringSymmetricDifference = lineString.symmetricDifference({'right': inputGeom, 'maxError': 1});
// Print the result to the console.
print('lineString.symmetricDifference(...) =', lineStringSymmetricDifference);
// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(lineString,
{'color': 'black'},
'Geometry [black]: lineString');
Map.addLayer(inputGeom,
{'color': 'blue'},
'Parameter [blue]: inputGeom');
Map.addLayer(lineStringSymmetricDifference,
{'color': 'red'},
'Result [red]: lineString.symmetricDifference');
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
# Define a LineString object.
linestring = ee.Geometry.LineString([[-122.09, 37.42], [-122.08, 37.43]])
# Define other inputs.
input_geom = ee.Geometry.BBox(-122.085, 37.415, -122.075, 37.425)
# Apply the symmetricDifference method to the LineString object.
linestring_symmetric_difference = linestring.symmetricDifference(
right=input_geom, maxError=1
)
# Print the result.
display(
'linestring.symmetricDifference(...) =', linestring_symmetric_difference
)
# Display relevant geometries on the map.
m = geemap.Map()
m.set_center(-122.085, 37.422, 15)
m.add_layer(linestring, {'color': 'black'}, 'Geometry [black]: linestring')
m.add_layer(input_geom, {'color': 'blue'}, 'Parameter [blue]: input_geom')
m.add_layer(
linestring_symmetric_difference,
{'color': 'red'},
'Result [red]: linestring.symmetricDifference',
)
m
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Last updated 2023-10-06 UTC.
[null,null,["Last updated 2023-10-06 UTC."],[[["`symmetricDifference()` returns a Geometry representing the parts of two geometries that do not intersect."],["It operates on a \"left\" geometry (on which the method is called) and a \"right\" geometry (provided as an argument)."],["Optional parameters allow for specifying the maximum error tolerance (`maxError`) and the projection (`proj`) for the operation."],["If a projection is not specified, calculations are performed in a spherical coordinate system using meters as the unit of distance."]]],["The `symmetricDifference` method calculates the symmetric difference between two geometries (`left` and `right`). It returns a new geometry representing the areas unique to each input. The method accepts an optional `maxError` for reprojection tolerance and a `proj` parameter to specify the projection. Both JavaScript and Python code examples demonstrate how to use the function, defining a `LineString` and a `BBox`, applying `symmetricDifference`, and visualizing the result.\n"]]