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ee.Geometry.LineString.buffer
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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
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Last updated 2023-10-06 UTC.
[null,null,["Last updated 2023-10-06 UTC."],[[["\u003cp\u003eReturns a Geometry representing the input geometry expanded or contracted by a specified distance.\u003c/p\u003e\n"],["\u003cp\u003eA positive distance expands the geometry (buffer), while a negative distance contracts it.\u003c/p\u003e\n"],["\u003cp\u003eThe buffer distance can be specified in meters or using a projection's units.\u003c/p\u003e\n"],["\u003cp\u003eAn optional \u003ccode\u003emaxError\u003c/code\u003e parameter controls the accuracy of the buffer approximation.\u003c/p\u003e\n"],["\u003cp\u003eAn optional projection (\u003ccode\u003eproj\u003c/code\u003e) can be specified for the buffer operation.\u003c/p\u003e\n"]]],[],null,["# ee.Geometry.LineString.buffer\n\nReturns 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.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|--------------------------------------------------------|----------|\n| LineString.buffer`(distance, `*maxError* `, `*proj*`)` | Geometry |\n\n| Argument | Type | Details |\n|------------------|----------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| this: `geometry` | Geometry | The geometry being buffered. |\n| `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. |\n| `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. |\n| `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. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// Define a LineString object.\nvar lineString = ee.Geometry.LineString([[-122.09, 37.42], [-122.08, 37.43]]);\n\n// Apply the buffer method to the LineString object.\nvar lineStringBuffer = lineString.buffer({'distance': 100});\n\n// Print the result to the console.\nprint('lineString.buffer(...) =', lineStringBuffer);\n\n// Display relevant geometries on the map.\nMap.setCenter(-122.085, 37.422, 15);\nMap.addLayer(lineString,\n {'color': 'black'},\n 'Geometry [black]: lineString');\nMap.addLayer(lineStringBuffer,\n {'color': 'red'},\n 'Result [red]: lineString.buffer');\n```\nPython setup\n\nSee the [Python Environment](/earth-engine/guides/python_install) page for information on the Python API and using\n`geemap` for interactive development. \n\n```python\nimport ee\nimport geemap.core as geemap\n```\n\n### Colab (Python)\n\n```python\n# Define a LineString object.\nlinestring = ee.Geometry.LineString([[-122.09, 37.42], [-122.08, 37.43]])\n\n# Apply the buffer method to the LineString object.\nlinestring_buffer = linestring.buffer(distance=100)\n\n# Print the result.\ndisplay('linestring.buffer(...) =', linestring_buffer)\n\n# Display relevant geometries on the map.\nm = geemap.Map()\nm.set_center(-122.085, 37.422, 15)\nm.add_layer(linestring, {'color': 'black'}, 'Geometry [black]: linestring')\nm.add_layer(\n linestring_buffer, {'color': 'red'}, 'Result [red]: linestring.buffer'\n)\nm\n```"]]