import { ProjectionBase } from '.';
import type { VectorPoint } from '../../geometry';
import type { ProjectionParams, ProjectionTransform } from '.';
/**
 * # Polyconic (American)
 *
 * **Classification**: Pseudoconical
 *
 * **Available forms**: Forward and inverse, spherical and ellipsoidal
 *
 * **Defined area**: Global
 *
 * **Alias**: poly
 *
 * **Domain**: 2D
 *
 * **Input type**: Geodetic coordinates
 *
 * **Output type**: Projected coordinates
 *
 * ## Projection String
 * ```
 * +proj=poly
 * ```
 *
 * ## Required Parameters
 * - None
 *
 * ## Optional Parameters
 * - `+lon_0=<value>`: Central meridian.
 * - `+ellps=<value>`: Ellipsoid used.
 * - `+R=<value>`: Radius of the projection sphere.
 * - `+x_0=<value>`: False easting.
 * - `+y_0=<value>`: False northing.
 *
 * ![Polyconic (American)](https://github.com/Open-S2/s2-tools/blob/master/assets/proj4/projections/images/poly.png?raw=true)
 */
export declare class Polyconic extends ProjectionBase implements ProjectionTransform {
    name: string;
    static names: string[];
    temp: number;
    e0: number;
    e1: number;
    e2: number;
    e3: number;
    ml0: number;
    /**
     * Preps an Polyconic projection
     * @param params - projection specific parameters
     */
    constructor(params?: ProjectionParams);
    /**
     * Polyconic forward equations--mapping lon-lat to x-y
     * @param p - lon-lat WGS84 point
     */
    forward(p: VectorPoint): void;
    /**
     * Polyconic inverse equations--mapping x-y to lon-lat
     * @param p - Polyconic point
     */
    inverse(p: VectorPoint): void;
}
//# sourceMappingURL=poly.d.ts.map