/**
 * @typedef {[number, number, number, number]} Bbox
 * [minx, miny, maxx, maxy] in WGS84.
 */
/**
 * Reads bbox metadata directly from GeoParquet files using DuckDB.
 * Handles file-level bbox fallback and row-group bbox extraction.
 */
export class ParquetBboxReader {
    /** @type {Map<string, Bbox | null>} */
    _bboxCache: Map<string, Bbox | null>;
    /** @type {Map<string, Record<string, Bbox> | null>} */
    _rowGroupCache: Map<string, Record<string, Bbox> | null>;
    /**
     * @param {{ id: string, url: string }[]} files
     * @param {import('./duckdb_adapter.js').DuckDBClient} duckdb
     * @returns {Promise<Record<string, Bbox> | null>}
     */
    getFileBboxes(files: {
        id: string;
        url: string;
    }[], duckdb: import("./duckdb_adapter.js").DuckDBClient): Promise<Record<string, Bbox> | null>;
    /**
     * @param {{ id: string, url: string }[]} files
     * @param {import('./duckdb_adapter.js').DuckDBClient} duckdb
     * @param {{ bboxColumn?: string, signal?: AbortSignal, onStatus?: (msg: string) => void }} [options]
     * @returns {Promise<Record<string, Record<string, Bbox>> | null>}
     */
    getRowGroupBboxes(files: {
        id: string;
        url: string;
    }[], duckdb: import("./duckdb_adapter.js").DuckDBClient, options?: {
        bboxColumn?: string;
        signal?: AbortSignal;
        onStatus?: (msg: string) => void;
    }): Promise<Record<string, Record<string, Bbox>> | null>;
    _getGeoMetadata(safeUrl: any, duckdb: any): Promise<any>;
    _getCoveringBboxPaths(safeUrl: any, duckdb: any, bboxColumn: any): Promise<{
        xminPath: any;
        yminPath: any;
        xmaxPath: any;
        ymaxPath: any;
    }>;
    _parseKvBlob(raw: any): any;
    _isValidWgs84Bbox(minx: any, miny: any, maxx: any, maxy: any): boolean;
}
/**
 * [minx, miny, maxx, maxy] in WGS84.
 */
export type Bbox = [number, number, number, number];