/**
 * Geometry ingestion.
 *
 * Accepts GeoJSON (FeatureCollection / Feature / bare geometry / array of
 * features) and TopoJSON, and normalises everything to a flat feature list with
 * a resolved join key per feature.
 *
 * Two deliberate opinions live here:
 *
 * 1. **Winding is repaired by default,** to the d3-geo spherical convention
 *    (exterior rings clockwise), which is the opposite of RFC 7946. A reversed
 *    ring is interpreted as "the whole sphere except this polygon", so the map
 *    fills solid and every feature reports identical world bounds. It is silent,
 *    it breaks labels and camera framing, and repairing costs one signed-area
 *    pass per ring. See `rewindPolygon` for the full explanation.
 * 2. **The join key is resolved explicitly and reported.** Auto-detection is a
 *    convenience, never a guess we hide: the resolved field name is returned so
 *    diagnostics can tell the developer what was actually used.
 *
 * @module geo/GeoData
 */
import type { GeoInput, NormalizedFeature, NormalizedGeo } from '../types';
/**
 * Normalize any supported geometry input.
 *
 */
export declare function normalizeGeo(input: GeoInput | null | undefined, options?: {
    keyField?: string;
    nameField?: string;
    object?: string;
    repairWinding?: boolean;
}): NormalizedGeo;
/** Build a lookup of key to feature. */
export declare function indexByKey(features: NormalizedFeature[]): Map<string, NormalizedFeature>;
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