import { Database as DatabaseInstance } from 'better-sqlite3';
import { TileJSON } from './tilejson';
import { TileHeaders } from './tiles';
declare type ValidMBTilesFormat = TileJSON['format'];
export interface Headers extends TileHeaders {
    'Last-Modified'?: string;
    Etag?: string;
}
/**
 * MBTiles metadata
 * See https://github.com/mapbox/mbtiles-spec/blob/master/1.3/spec.md
 */
export interface Metadata {
    /** The human-readable name of the tileset */
    name: string;
    /** The file format of the tile data: `pbf`, `jpg`, `png`, `webp`, or an
     * [IETF media
     * type](https://www.iana.org/assignments/media-types/media-types.xhtml) for
     * other formats */
    format: 'pbf' | 'jpg' | 'png' | 'webp';
    /** The maximum extent of the rendered map area. Bounds must define an area
     * covered by all zoom levels. The bounds are represented as `WGS 84`
     * latitude and longitude values, in the OpenLayers Bounds format (left,
     * bottom, right, top). For example, the `bounds` of the full Earth, minus
     * the poles, would be: `-180.0,-85,180,85` */
    bounds?: [number, number, number, number];
    /** The longitude, latitude, and zoom level of the default view of the map. */
    center?: [number, number, number];
    /** The lowest zoom level for which the tileset provides data */
    minzoom?: number;
    /** The highest zoom level for which the tileset provides data */
    maxzoom?: number;
    /** An attribution string, which explains the sources of data and/or style for the map */
    attribution?: string;
    /** A description of the tileset's content */
    description?: string;
    type?: 'overlay' | 'baselayer';
    /** The version of the tileset. This refers to a revision of the tileset
     * itself, not of the MBTiles specification. The MBTiles Spec says this
     * should be a number, but node-mbtiles implements this as a string, which
     * is the same as TileJSON */
    version?: string;
    json?: string;
}
export declare const VALID_MBTILES_FORMATS: ValidMBTilesFormat[];
export declare function isValidMBTilesFormat(format: string): format is ValidMBTilesFormat;
export declare function mbTilesToTileJSON(mbTilesDb: DatabaseInstance): TileJSON;
export declare function extractMBTilesMetadata(mbTilesDb: DatabaseInstance): Metadata;
export {};