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.

Geometry.buffer(distance, maxError, proj)Geometry
this: geometryGeometry

The geometry being buffered.


The 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: null

The 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: null

If 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.


Code Editor (JavaScript)

// Define a Geometry object.
var geometry = ee.Geometry({
  'type': 'Polygon',
    [[[-122.081, 37.417],
      [-122.086, 37.421],
      [-122.084, 37.418],
      [-122.089, 37.416]]]

// Apply the buffer method to the Geometry object.
var geometryBuffer = geometry.buffer({'distance': 100});

// Print the result to the console.
print('geometry.buffer(...) =', geometryBuffer);

// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
             {'color': 'black'},
             'Geometry [black]: geometry');
             {'color': 'red'},
             'Result [red]: geometry.buffer');