/// <reference types="google.maps" />
/** Utility functions for computing angles, distances, and areas on the sphere. */
export declare class MigrationSpherical {
    /**
     * Returns the area of a closed path.
     *
     * @param path - A closed path.
     * @param radiusOfSphere - Optional. The radius of the sphere in meters. Defaults to Earth's radius.
     * @returns The area in square meters.
     */
    static computeArea(path: google.maps.LatLng[] | google.maps.MVCArray<google.maps.LatLng>, radiusOfSphere?: number): number;
    /**
     * Returns the distance, in meters, between two LatLngs.
     *
     * @param from - The first LatLng.
     * @param to - The second LatLng.
     * @param radius - Optional. The radius of the sphere in meters. Defaults to Earth's radius.
     * @returns The distance in meters.
     */
    static computeDistanceBetween(from: google.maps.LatLng | google.maps.LatLngLiteral, to: google.maps.LatLng | google.maps.LatLngLiteral, radius?: number): number;
    /**
     * Returns the heading from one LatLng to another LatLng.
     *
     * @param from - The first LatLng.
     * @param to - The second LatLng.
     * @returns The heading in degrees from North in the range [-180, 180).
     */
    static computeHeading(from: google.maps.LatLng | google.maps.LatLngLiteral, to: google.maps.LatLng | google.maps.LatLngLiteral): number;
    /**
     * Returns the length of the given path.
     *
     * @param path - A sequence of LatLngs.
     * @param radius - Optional. The radius of the sphere in meters. Defaults to Earth's radius.
     * @returns The length in meters.
     */
    static computeLength(path: google.maps.LatLng[] | google.maps.MVCArray<google.maps.LatLng>, radius?: number): number;
    /**
     * Returns the LatLng resulting from moving a distance from an origin in the specified heading.
     *
     * @param from - The starting LatLng.
     * @param distance - The distance to travel in meters.
     * @param heading - The heading in degrees clockwise from North.
     * @param radius - Optional. The radius of the sphere in meters. Defaults to Earth's radius.
     * @returns The destination LatLng.
     */
    static computeOffset(from: google.maps.LatLng | google.maps.LatLngLiteral, distance: number, heading: number, radius?: number): google.maps.LatLng;
    /**
     * Returns the location of origin when provided with a LatLng destination, meters traveled, and heading.
     *
     * @param to - The destination LatLng.
     * @param distance - The distance traveled in meters.
     * @param heading - The heading in degrees clockwise from North.
     * @param radius - Optional. The radius of the sphere in meters. Defaults to Earth's radius.
     * @returns The origin LatLng.
     */
    static computeOffsetOrigin(to: google.maps.LatLng | google.maps.LatLngLiteral, distance: number, heading: number, radius?: number): google.maps.LatLng;
    /**
     * Returns the signed area of a closed path. The sign of the area is positive if the ordering is counter-clockwise.
     *
     * @param loop - A closed loop path.
     * @param radius - Optional. The radius of the sphere in meters. Defaults to Earth's radius.
     * @returns The signed area in square meters.
     */
    static computeSignedArea(loop: google.maps.LatLng[] | google.maps.MVCArray<google.maps.LatLng>, radius?: number): number;
    /**
     * Returns the LatLng which lies the given fraction of the way between the origin and the destination.
     *
     * @param from - The starting LatLng.
     * @param to - The ending LatLng.
     * @param fraction - A fraction between 0 and 1.
     * @returns The interpolated LatLng.
     */
    static interpolate(from: google.maps.LatLng | google.maps.LatLngLiteral, to: google.maps.LatLng | google.maps.LatLngLiteral, fraction: number): google.maps.LatLng;
}