import * as i0 from "@angular/core";
export declare class DistanceHelper {
    static readonly R = 6378137;
    calculate(a: [number, number], b: [number, number]): number;
    private toRad;
    private squared;
    private haversine;
    static ɵfac: i0.ɵɵFactoryDeclaration<DistanceHelper, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<DistanceHelper>;
}