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ee.Geometry.Point.buffer

  • Thebuffer method returns a buffered geometry, expanding or contracting it based on a positive or negative distance.

  • Thebuffer method can take optional arguments formaxError andproj to control approximation and projection.

  • Examples demonstrate how to use thebuffer method in both JavaScript and Python.

 Returns the input buffered by a given distance. If the distance is positive, the geometry is expanded, and if the distance is negative, the geometry is contracted.

UsageReturns
Point.buffer(distance,maxError,proj)Geometry
ArgumentTypeDetails
this:geometryGeometryThe geometry being buffered.
distanceFloatThe distance of the buffering, which may be negative. If no projection is specified, the unit is meters. Otherwise the unit is in the coordinate system of the projection.
maxErrorErrorMargin, default: nullThe maximum amount of error tolerated when approximating the buffering circle and performing any necessary reprojection. If unspecified, defaults to 1% of the distance.
projProjection, default: nullIf specified, the buffering will be performed in this projection and the distance will be interpreted as units of the coordinate system of this projection. Otherwise the distance is interpereted as meters and the buffering is performed in a spherical coordinate system.

Examples

Code Editor (JavaScript)

// Define a Point object.varpoint=ee.Geometry.Point(-122.082,37.42);// Apply the buffer method to the Point object.varpointBuffer=point.buffer({'distance':100});// Print the result to the console.print('point.buffer(...) =',pointBuffer);// Display relevant geometries on the map.Map.setCenter(-122.085,37.422,15);Map.addLayer(point,{'color':'black'},'Geometry [black]: point');Map.addLayer(pointBuffer,{'color':'red'},'Result [red]: point.buffer');

Python setup

See the Python Environment page for information on the Python API and usinggeemap for interactive development.

importeeimportgeemap.coreasgeemap

Colab (Python)

# Define a Point object.point=ee.Geometry.Point(-122.082,37.42)# Apply the buffer method to the Point object.point_buffer=point.buffer(distance=100)# Print the result.display('point.buffer(...) =',point_buffer)# Display relevant geometries on the map.m=geemap.Map()m.set_center(-122.085,37.422,15)m.add_layer(point,{'color':'black'},'Geometry [black]: point')m.add_layer(point_buffer,{'color':'red'},'Result [red]: point.buffer')m

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Last updated 2023-10-06 UTC.