import type { IActivityHandler } from "../../IActivityHandler";
/** Defines inputs for the Distance Engine activity. This activity relies on the geometry engine. */
export interface DistanceEngineTaskInputs {
    geometry1: __esri.GeometryUnion;
    geometry2: __esri.GeometryUnion;
    unit?: "millimeters" | "centimeters" | "meters" | "kilometers" | "inches" | "feet" | "yards" | "miles" | "nautical-miles" | string;
}
/** Defines outputs for the Distance Engine activity. */
export interface DistanceEngineTaskOutputs {
    /** @description The distance between the two geometries. */
    distance: number;
}
export declare class DistanceEngineTask implements IActivityHandler {
    static readonly action = "gcx:wf:arcgis::DistanceEngineTask";
    static readonly suite = "gcx:wf:builtin";
    execute(inputs: DistanceEngineTaskInputs): DistanceEngineTaskOutputs;
}