import type { LocationFix } from '../types';
/** Options for {@link buildGpxTrack}. */
export interface BuildGpxTrackOptions {
    /** Track name written to `<trk><name>`. Default: "Track". */
    trackName?: string;
    /** Creator string written to the `<gpx creator="...">` attribute. */
    creator?: string;
}
/**
 * Builds a GPX 1.1 track document from a series of GPS fixes, suitable for
 * writing to a file and sharing/exporting (e.g. via `expo-file-system` +
 * `expo-sharing`).
 *
 * Each fix becomes a `<trkpt>`: latitude/longitude as attributes, altitude
 * as `<ele>`, timestamp as `<time>` (ISO 8601, UTC), and accuracy/bearing/
 * speed as a `<extensions>` block (GPX core has no standard elements for
 * them).
 *
 * Points without a valid `latitude`/`longitude` are skipped.
 *
 * @example
 * ```ts
 * const gpx = buildGpxTrack(trackPoints, { trackName: 'Morning walk' });
 * await FileSystem.writeAsStringAsync(fileUri, gpx);
 * ```
 */
export declare function buildGpxTrack(points: readonly LocationFix[], options?: BuildGpxTrackOptions): string;
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