import { ProjectionBase } from './base';
import type { VectorPoint } from '../../geometry';
import type { ProjectionParams, ProjectionTransform } from '.';
/**
 * # Azimuthal Equidistant Projection
 *
 * **Classification**: Azimuthal
 *
 * **Available forms**: Forward and inverse, spherical and ellipsoidal
 *
 * **Defined area**: Global
 *
 * **Alias**: `aeqd`
 *
 * **Domain**: 2D
 *
 * **Input type**: Geodetic coordinates
 *
 * **Output type**: Projected coordinates
 *
 * ## Projection String
 * ```
 * +proj=aeqd
 * ```
 *
 * ## Required Parameters
 * None
 *
 * ## Optional Parameters
 * - `guam`: Use Guam ellipsoidal formulas (accurate near Guam: λ ≈ 144.5°, φ ≈ 13.5°)
 * - `lat0`: Latitude of origin
 * - `lon0`: Longitude of origin
 * - `x0`: False easting
 * - `y0`: False northing
 * - `ellps`: Ellipsoid name
 * - `R`: Radius of sphere
 *
 * ![Azimuthal Equidistant Projection](https://github.com/Open-S2/s2-tools/blob/master/assets/proj4/projections/images/aeqd.png?raw=true)
 */
export declare class AzimuthalEquidistant extends ProjectionBase implements ProjectionTransform {
    name: string;
    static names: string[];
    sinP12: number;
    cosP12: number;
    /**
     * Preps an Albers Conic Equal Area projection
     * @param params - projection specific parameters
     */
    constructor(params?: ProjectionParams);
    /**
     * Azimuthal Equidistant forward equations--mapping lon-lat to x-y
     * @param p - lon-lat WGS84 point
     */
    forward(p: VectorPoint): void;
    /**
     * Azimuthal Equidistant inverse equations--mapping x-y to lon-lat
     * @param p - Azimuthal Equidistant point
     */
    inverse(p: VectorPoint): void;
}
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