ee.Geometry.Point.perimeter
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
// 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
# 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."],[[["This function calculates the perimeter of the polygonal parts of a geometry, returning the total length."],["For multi-geometries, the perimeter is the sum of its components' perimeters."],["The function can be used with an optional `maxError` for reprojection and an optional `proj` to specify the unit of the output."],["When applied to a Point geometry, the perimeter function will return 0."]]],["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"]]