/**
 * Format byte count as human-readable string.
 * @param {number} bytes
 * @returns {string}
 */
export function formatSize(bytes: number): string;
/**
 * Get the ordered list of all OPFS prefixes (longest first).
 * @returns {string[]}
 */
export function getOpfsPrefixes(): string[];
/** Return the UTM zone number (1–60) for a given longitude. */
export function getUtmZone(lon: any): number;
/**
 * Check whether a bbox fits in a single UTM zone.
 * @param {{ west: number, south: number, east: number, north: number }} bbox
 * @returns {{ zone: number, hemisphere: string } | null} null if it spans multiple zones.
 */
export function bboxUtmZone(bbox: {
    west: number;
    south: number;
    east: number;
    north: number;
}): {
    zone: number;
    hemisphere: string;
} | null;
/**
 * Get browser storage estimate.
 * @returns {Promise<{ usage: number | undefined, quota: number | undefined }>}
 */
export function getStorageEstimate(): Promise<{
    usage: number | undefined;
    quota: number | undefined;
}>;
/**
 * Wrap an OPFS File handle into an async buffer interface for hyparquet.
 * @param {File} file
 * @returns {{ byteLength: number, slice: (start: number, end: number) => Promise<ArrayBuffer> }}
 */
export function fileToAsyncBuffer(file: File): {
    byteLength: number;
    slice: (start: number, end: number) => Promise<ArrayBuffer>;
};
export const OPFS_PREFIX_GPKG_TMP: any;
export const OPFS_PREFIX_GPKG: any;
export const OPFS_PREFIX_OUTPUT: any;
export const OPFS_PREFIX_TMP: any;
export const OPFS_PREFIX_SHP_TMP: any;
export const OPFS_PREFIX_KML_TMP: any;
export const OPFS_PREFIX_DXF_TMP: any;
export const OPFS_PREFIX_TMPDIR: any;