ee.Geometry.BBox.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 |
---|
BBox.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
// Define a BBox object.
var bBox = ee.Geometry.BBox(-122.09, 37.42, -122.08, 37.43);
// Apply the buffer method to the BBox object.
var bBoxBuffer = bBox.buffer({'distance': 100});
// Print the result to the console.
print('bBox.buffer(...) =', bBoxBuffer);
// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(bBox,
{'color': 'black'},
'Geometry [black]: bBox');
Map.addLayer(bBoxBuffer,
{'color': 'red'},
'Result [red]: bBox.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
# Define a BBox object.
bbox = ee.Geometry.BBox(-122.09, 37.42, -122.08, 37.43)
# Apply the buffer method to the BBox object.
bbox_buffer = bbox.buffer(distance=100)
# Print the result.
display('bbox.buffer(...) =', bbox_buffer)
# Display relevant geometries on the map.
m = geemap.Map()
m.set_center(-122.085, 37.422, 15)
m.add_layer(bbox, {'color': 'black'}, 'Geometry [black]: bbox')
m.add_layer(bbox_buffer, {'color': 'red'}, 'Result [red]: bbox.buffer')
m
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Last updated 2023-10-06 UTC.
[null,null,["Last updated 2023-10-06 UTC."],[[["`buffer()` returns a Geometry that is the input geometry expanded or contracted by a specified distance."],["The `distance` parameter determines the buffer size, with positive values expanding and negative values contracting the geometry."],["Buffering can be performed in a specified projection using the `proj` parameter, or in meters using a spherical coordinate system if no projection is given."],["The `maxError` parameter controls the approximation accuracy during buffering and reprojection, defaulting to 1% of the distance if not specified."]]],["The `buffer` method expands or contracts a geometry by a specified distance. A positive distance expands the geometry, while a negative distance contracts it. The distance unit defaults to meters but can be specified via a projection. Users can define `maxError` for approximation tolerance. The method returns a new Geometry. Examples are provided in both JavaScript and Python to demonstrate buffering a BBox object and visualize the results.\n"]]