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ee.Geometry.LineString.perimeter
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Returns the length of the perimeter of the polygonal parts of the geometry. The perimeter of multi geometries is the sum of the perimeters of their components.
| Usage | Returns | LineString.perimeter(maxError, proj) | Float |
| Argument | Type | Details | this: geometry | Geometry | The input geometry. |
maxError | ErrorMargin, default: null | The maximum amount of error tolerated when performing any necessary reprojection. |
proj | Projection, default: null | If specified, the result will be in the units of the coordinate system of this projection. Otherwise it will be in meters. |
Examples
Code Editor (JavaScript)
// Define a LineString object.
var lineString = ee.Geometry.LineString([[-122.09, 37.42], [-122.08, 37.43]]);
// Apply the perimeter method to the LineString object.
var lineStringPerimeter = lineString.perimeter({'maxError': 1});
// Print the result to the console.
print('lineString.perimeter(...) =', lineStringPerimeter);
// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(lineString,
{'color': 'black'},
'Geometry [black]: lineString');
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 perimeter method to the LineString object.
linestring_perimeter = linestring.perimeter(maxError=1)
# Print the result.
display('linestring.perimeter(...) =', linestring_perimeter)
# 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
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Last updated 2023-10-06 UTC.
[null,null,["Last updated 2023-10-06 UTC."],[[["\u003cp\u003eCalculates the total length of all sides of a polygon or the length of a line.\u003c/p\u003e\n"],["\u003cp\u003eApplicable to LineString geometries and returns the result as a float.\u003c/p\u003e\n"],["\u003cp\u003eAllows specifying \u003ccode\u003emaxError\u003c/code\u003e for reprojection and \u003ccode\u003eproj\u003c/code\u003e for the desired unit of the output.\u003c/p\u003e\n"],["\u003cp\u003eReturns the perimeter in meters by default if the projection is not specified.\u003c/p\u003e\n"]]],[],null,["# ee.Geometry.LineString.perimeter\n\nReturns the length of the perimeter of the polygonal parts of the geometry. The perimeter of multi geometries is the sum of the perimeters of their components.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|-------------------------------------------------|---------|\n| LineString.perimeter`(`*maxError* `, `*proj*`)` | Float |\n\n| Argument | Type | Details |\n|------------------|----------------------------|----------------------------------------------------------------------------------------------------------------------------|\n| this: `geometry` | Geometry | The input geometry. |\n| `maxError` | ErrorMargin, default: null | The maximum amount of error tolerated when performing any necessary reprojection. |\n| `proj` | Projection, default: null | If specified, the result will be in the units of the coordinate system of this projection. Otherwise it will be in meters. |\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 perimeter method to the LineString object.\nvar lineStringPerimeter = lineString.perimeter({'maxError': 1});\n\n// Print the result to the console.\nprint('lineString.perimeter(...) =', lineStringPerimeter);\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');\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 perimeter method to the LineString object.\nlinestring_perimeter = linestring.perimeter(maxError=1)\n\n# Print the result.\ndisplay('linestring.perimeter(...) =', linestring_perimeter)\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\n```"]]