export declare const enum WKId {
    gps = 4326,
    webMercator = 102100
}
/**
 * An enumeration of the valid measurement units.
 */
export declare const enum MeasurementUnits {
    Feet = "Feet",
    Meters = "Meters"
}
/**
 * Parameters for {@link getElevationData}.
 */
export interface EpqsParameters {
    /** Longitude */
    x: number;
    /** Latitude */
    y: number;
    /** Specifies the output measurement units */
    units?: MeasurementUnits;
    /**
     * The Well-Known Identifier (WKID) of x and y.
     */
    wkid?: WKId;
    /**
     * Set to `true` if you want the output to include
     * an `attributes` property with an `AcquisitionDate`
     * date value.
     */
    includeDate?: boolean;
}
/**
 * Represents a spatial reference system, defined by a
 * {@link WKId}
 */
export interface SpatialReference {
    wkid: WKId;
    latestWkid?: WKId;
}
export type Digit = 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9;
export type Year = `20${Digit}${Digit}`;
export type Month = 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12;
export type Day = Month | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31;
type DateOrString = Date | `${Month}/${Day}/${Year}`;
export interface ElevationDataAttributes<DT extends DateOrString> {
    [key: string]: unknown;
    AcquisitionDate: DT;
}
export interface ElevationData<DT extends DateOrString> {
    x: number;
    y: number;
    spatialReference: SpatialReference;
    locationId: number;
    value: number;
    rasterId: number;
    resolution: number;
    attributes?: ElevationDataAttributes<DT>;
}
/**
 * Calls the Elevation Point Query Service (EPQS)
 * > This API returns the elevation in international feet or meters for a specific
 * > latitude/longitude (NAD 1983) point from the USGS Elevation Service hosted at
 * > the [U.S. Geological Survey (USGS) National Geospatial Technical Operations Center (NGTOC)](https://www.usgs.gov/national-geospatial-technical-operations-center).
 * @param parameters - query parameters, including x and y coordinates.
 * @param url - Override the default URL in case it changes and this package hasn't been updated yet.
 * @returns - Returns elevation data from the input location.
 */
export declare function getElevationData(parameters: EpqsParameters, url?: string): Promise<ElevationData<Date>>;
export default getElevationData;