import { ProjectionBase } from '.';
import type { VectorPoint } from '../../geometry';
import type { ProjectionParams, ProjectionTransform } from '.';
/**
 * # Robinson
 *
 * **Classification**: Pseudocylindrical
 *
 * **Available forms**: Forward and inverse, spherical projection
 *
 * **Defined area**: Global
 *
 * **Alias**: robin
 *
 * **Domain**: 2D
 *
 * **Input type**: Geodetic coordinates
 *
 * **Output type**: Projected coordinates
 *
 * ## Projection String
 * ```
 * +proj=robin
 * ```
 *
 * ## Required Parameters
 * - None
 *
 * ## Optional Parameters
 * - `+lon_0=<value>`: Central meridian.
 * - `+R=<value>`: Radius of the projection sphere.
 * - `+x_0=<value>`: False easting.
 * - `+y_0=<value>`: False northing.
 *
 * ![Robinson](https://github.com/Open-S2/s2-tools/blob/master/assets/proj4/projections/images/robin.png?raw=true)
 */
export declare class Robinson extends ProjectionBase implements ProjectionTransform {
    name: string;
    static names: string[];
    x0: number;
    y0: number;
    long0: number;
    /**
     * Preps an Robinson projection
     * Based on https://github.com/OSGeo/proj.4/blob/master/src/PJ_robin.c
     * Polynomial coeficients from http://article.gmane.org/gmane.comp.gis.proj-4.devel/6039
     * @param params - projection specific parameters
     */
    constructor(params?: ProjectionParams);
    /**
     * Robinson forward equations--mapping lon-lat to x-y
     * @param p - lon-lat WGS84 point
     */
    forward(p: VectorPoint): void;
    /**
     * Robinson inverse equations--mapping x-y to lon-lat
     * @param p - Robinson point
     */
    inverse(p: VectorPoint): void;
}
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