ee.Feature.perimeter

Returns the length of the perimeter of the polygonal parts of the geometry of a given feature. The perimeter of multi geometries is the sum of the perimeters of their components.

UsageReturns
Feature.perimeter(maxError, proj)Float
ArgumentTypeDetails
this: featureElementThe feature from which the geometry is taken.
maxErrorErrorMargin, default: nullThe maximum amount of error tolerated when performing any necessary reprojection.
projProjection, default: nullIf specified, the result will be in the units of the coordinate system of this projection. Otherwise it will be in meters.