import type { IActivityHandler } from "../../IActivityHandler";
/** Defines inputs for the Length activity. This activity relies on the geometry engine. */
export interface LengthEngineTaskInputs {
    geometry: __esri.GeometryUnion;
    geodesic?: boolean;
    unit?: "millimeters" | "centimeters" | "meters" | "kilometers" | "inches" | "feet" | "yards" | "miles" | "nautical-miles" | string;
}
/** Defines outputs for the Length activity. */
export interface LengthEngineTaskOutputs {
    /** @description The calulated length. */
    length: number;
}
export declare class LengthEngineTask implements IActivityHandler {
    static readonly action = "gcx:wf:arcgis::LengthEngineTask";
    static readonly suite = "gcx:wf:builtin";
    execute(inputs: LengthEngineTaskInputs): Promise<LengthEngineTaskOutputs>;
    private executeUsing;
}