ee.Geometry.MultiPoint.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 |
---|
MultiPoint.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 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
# 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
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Last updated 2023-10-06 UTC.
[null,null,["Last updated 2023-10-06 UTC."],[[["Expands or contracts a MultiPoint geometry by a specified distance."],["Positive distance values expand the geometry, while negative values contract it."],["Buffering can be performed using meters or a projected coordinate system with its own units."],["An optional error margin controls the accuracy of the buffering operation."]]],["The `buffer` method modifies a geometry by expanding or contracting it based on a specified distance. A positive distance expands the geometry, while a negative distance contracts it. The method accepts a `distance` (in meters or projection units), an optional `maxError` for approximation tolerance, and an optional `proj` for specifying the projection. It operates on a `geometry` and returns a new `Geometry` object. Example code is provided in JavaScript and Python using the MultiPoint object to demonstrate the application.\n"]]