ee.Geometry.MultiPoint.buffer

  • The buffer method returns the input geometry buffered by a given distance, expanding it if the distance is positive and contracting it if negative.

  • The MultiPoint.buffer method returns a Geometry object.

  • The method takes arguments for distance, maxError, and an optional proj for specifying the projection for the buffering operation.

  • The distance unit is meters by default unless a projection is specified.

  • The provided examples demonstrate how to use the buffer method on a MultiPoint object 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
MultiPoint.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 MultiPoint object.
var multiPoint = ee.Geometry.MultiPoint([[-122.082, 37.420], [-122.081, 37.426]]);

// Apply the buffer method to the MultiPoint object.
var multiPointBuffer = multiPoint.buffer({'distance': 100});

// Print the result to the console.
print('multiPoint.buffer(...) =', multiPointBuffer);

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

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

Colab (Python)

# Define a MultiPoint object.
multipoint = ee.Geometry.MultiPoint([[-122.082, 37.420], [-122.081, 37.426]])

# Apply the buffer method to the MultiPoint object.
multipoint_buffer = multipoint.buffer(distance=100)

# Print the result.
display('multipoint.buffer(...) =', multipoint_buffer)

# 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(
    multipoint_buffer, {'color': 'red'}, 'Result [red]: multipoint.buffer'
)
m