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Returns the result of subtracting the 'right' geometry from the 'left' geometry.
Usage
Returns
Point.difference(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.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2023-10-06 UTC."],[[["\u003cp\u003e\u003ccode\u003edifference()\u003c/code\u003e returns the result of subtracting the 'right' geometry from the 'left' geometry.\u003c/p\u003e\n"],["\u003cp\u003eThis method can be applied to \u003ccode\u003ePoint\u003c/code\u003e geometries.\u003c/p\u003e\n"],["\u003cp\u003eIt accepts a 'right' geometry, 'maxError', and 'proj' as optional parameters.\u003c/p\u003e\n"],["\u003cp\u003eThe operation is performed in spherical coordinates with distances in meters by default, unless a projection is specified.\u003c/p\u003e\n"]]],["The `difference` method subtracts a 'right' geometry from a 'left' geometry, returning the resulting geometry. It accepts the 'right' geometry, an optional `maxError` for reprojection tolerance, and an optional `proj` for the projection. If `proj` is not set, operations are in a spherical system with meters. An example demonstrates finding the difference between a `Point` and a `BBox`, and visualizing the result on a map in both Python and JavaScript.\n"],null,["# ee.Geometry.Point.difference\n\nReturns the result of subtracting the 'right' geometry from the 'left' geometry.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|----------------------------------------------------|----------|\n| Point.difference`(right, `*maxError* `, `*proj*`)` | Geometry |\n\n| Argument | Type | Details |\n|--------------|----------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| this: `left` | Geometry | The geometry used as the left operand of the operation. |\n| `right` | Geometry | The geometry used as the right operand of the operation. |\n| `maxError` | ErrorMargin, default: null | The maximum amount of error tolerated when performing any necessary reprojection. |\n| `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. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// Define a Point object.\nvar point = ee.Geometry.Point(-122.082, 37.42);\n\n// Define other inputs.\nvar inputGeom = ee.Geometry.BBox(-122.085, 37.415, -122.075, 37.425);\n\n// Apply the difference method to the Point object.\nvar pointDifference = point.difference({'right': inputGeom, 'maxError': 1});\n\n// Print the result to the console.\nprint('point.difference(...) =', pointDifference);\n\n// Display relevant geometries on the map.\nMap.setCenter(-122.085, 37.422, 15);\nMap.addLayer(point,\n {'color': 'black'},\n 'Geometry [black]: point');\nMap.addLayer(inputGeom,\n {'color': 'blue'},\n 'Parameter [blue]: inputGeom');\nMap.addLayer(pointDifference,\n {'color': 'red'},\n 'Result [red]: point.difference');\n```\nPython setup\n\nSee the [Python Environment](/earth-engine/guides/python_install) page for information on the Python API and using\n`geemap` for interactive development. \n\n```python\nimport ee\nimport geemap.core as geemap\n```\n\n### Colab (Python)\n\n```python\n# Define a Point object.\npoint = ee.Geometry.Point(-122.082, 37.42)\n\n# Define other inputs.\ninput_geom = ee.Geometry.BBox(-122.085, 37.415, -122.075, 37.425)\n\n# Apply the difference method to the Point object.\npoint_difference = point.difference(right=input_geom, maxError=1)\n\n# Print the result.\ndisplay('point.difference(...) =', point_difference)\n\n# Display relevant geometries on the map.\nm = geemap.Map()\nm.set_center(-122.085, 37.422, 15)\nm.add_layer(point, {'color': 'black'}, 'Geometry [black]: point')\nm.add_layer(input_geom, {'color': 'blue'}, 'Parameter [blue]: input_geom')\nm.add_layer(\n point_difference, {'color': 'red'}, 'Result [red]: point.difference'\n)\nm\n```"]]