/** @jsx jsx */
/** @jsxFrag React.Fragment */
import type { ItemClassConfiguration } from '@riboseinc/paneron-registry-kit/types';
import { type Extent } from './extent';
import { type CommonGRItemData } from './common';
export interface DatumData extends CommonGRItemData {
    scope: string;
    extent: Extent;
    /** UUID of relevant Extent item. */
    extentRef?: string;
    /** A.k.a. “anchor”. */
    originDescription: string;
    coordinateReferenceEpoch: string | null;
    releaseDate: string;
}
export declare const DATUM_DEFAULTS: DatumData;
export interface GeodeticDatumData extends DatumData {
    ellipsoid: string;
    primeMeridian: string;
}
export declare const geodeticDatum: ItemClassConfiguration<GeodeticDatumData>;
export declare const verticalDatum: ItemClassConfiguration<DatumData>;
export declare const engineeringDatum: ItemClassConfiguration<DatumData>;