export interface GPS {
    lng: number;
    lat: number;
}
export interface PlaneXY {
    x: number;
    y: number;
}
export interface ThreeParams {
    dx: number;
    dy: number;
    dz: number;
}
export interface SevenParams extends ThreeParams {
    rx: number;
    ry: number;
    rz: number;
    scale: number;
}
/**
 * GPS → 平面（3参数）
 */
export declare function gpsToPlaneBy3Params(coordSystem: 'CGCS2000' | '北京54', params: ThreeParams, gps: GPS, centralMeridian?: number): PlaneXY;
/**
 * GPS → 平面（7参数）
 */
export declare function gpsToPlaneBy7Params(coordSystem: 'CGCS2000' | '北京54', params: SevenParams, gps: GPS, centralMeridian?: number): PlaneXY;
/**
 * 平面 → GPS 坐标（反向投影）
 */
export declare function planeToGps(coordSystem: 'CGCS2000' | '北京54', params: ThreeParams | SevenParams, xy: PlaneXY, centralMeridian: number, isSevenParam?: boolean): GPS;