ee.Geometry.LineString.buffer

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.

Usage	Returns
LineString.buffer(distance, maxError, proj)	Geometry

Argument	Type	Details
this: geometry	Geometry	The geometry being buffered.
distance	Float	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.
maxError	ErrorMargin, 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.
proj	Projection, 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.

Examples

Code Editor (JavaScript)

// Define a LineString object.
var lineString = ee.Geometry.LineString([[-122.09, 37.42], [-122.08, 37.43]]);

// Apply the buffer method to the LineString object.
var lineStringBuffer = lineString.buffer({'distance': 100});

// Print the result to the console.
print('lineString.buffer(...) =', lineStringBuffer);

// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(lineString,
             {'color': 'black'},
             'Geometry [black]: lineString');
Map.addLayer(lineStringBuffer,
             {'color': 'red'},
             'Result [red]: lineString.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 LineString object.
linestring = ee.Geometry.LineString([[-122.09, 37.42], [-122.08, 37.43]])

# Apply the buffer method to the LineString object.
linestring_buffer = linestring.buffer(distance=100)

# Print the result.
display('linestring.buffer(...) =', linestring_buffer)

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