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ee.Geometry.Point.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 | Point.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 Point object.
var point = ee.Geometry.Point(-122.082, 37.42);
// Apply the perimeter method to the Point object.
var pointPerimeter = point.perimeter({'maxError': 1});
// Print the result to the console.
print('point.perimeter(...) =', pointPerimeter);
// Display relevant geometries on the map.
Map.setCenter(-122.085, 37.422, 15);
Map.addLayer(point,
{'color': 'black'},
'Geometry [black]: point');
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 Point object.
point = ee.Geometry.Point(-122.082, 37.42)
# Apply the perimeter method to the Point object.
point_perimeter = point.perimeter(maxError=1)
# Print the result.
display('point.perimeter(...) =', point_perimeter)
# Display relevant geometries on the map.
m = geemap.Map()
m.set_center(-122.085, 37.422, 15)
m.add_layer(point, {'color': 'black'}, 'Geometry [black]: point')
m
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Last updated 2023-10-06 UTC.
[null,null,["Last updated 2023-10-06 UTC."],[[["\u003cp\u003eThis function calculates the perimeter of the polygonal parts of a geometry, returning the total length.\u003c/p\u003e\n"],["\u003cp\u003eFor multi-geometries, the perimeter is the sum of its components' perimeters.\u003c/p\u003e\n"],["\u003cp\u003eThe function can be used with an optional \u003ccode\u003emaxError\u003c/code\u003e for reprojection and an optional \u003ccode\u003eproj\u003c/code\u003e to specify the unit of the output.\u003c/p\u003e\n"],["\u003cp\u003eWhen applied to a Point geometry, the perimeter function will return 0.\u003c/p\u003e\n"]]],["The `perimeter` method calculates the length of the perimeter of a geometry's polygonal parts, with multi-geometries' perimeters being the sum of their components' perimeters. It accepts optional `maxError` for reprojection tolerance and `proj` to specify the output units, defaulting to meters. The method returns a float value, representing the perimeter length. Examples show how to calculate and print the perimeter of a `Point` object in both JavaScript and Python.\n"],null,["# ee.Geometry.Point.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| Point.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 Point object.\nvar point = ee.Geometry.Point(-122.082, 37.42);\n\n// Apply the perimeter method to the Point object.\nvar pointPerimeter = point.perimeter({'maxError': 1});\n\n// Print the result to the console.\nprint('point.perimeter(...) =', pointPerimeter);\n\n// Display relevant geometries on the map.\nMap.setCenter(-122.085, 37.422, 15);\nMap.addLayer(point,\n {'color': 'black'},\n 'Geometry [black]: point');\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 Point object.\npoint = ee.Geometry.Point(-122.082, 37.42)\n\n# Apply the perimeter method to the Point object.\npoint_perimeter = point.perimeter(maxError=1)\n\n# Print the result.\ndisplay('point.perimeter(...) =', point_perimeter)\n\n# Display relevant geometries on the map.\nm = geemap.Map()\nm.set_center(-122.085, 37.422, 15)\nm.add_layer(point, {'color': 'black'}, 'Geometry [black]: point')\nm\n```"]]