import { ConfigImagery } from '@basemaps/config';
import { Size } from '@basemaps/geo';
export declare const PreviewSize: {
    width: number;
    height: number;
};
/**
 * Find the approximate center and zoom level for of a imagery set
 *
 * @param imageryList
 * @param previewSize
 * @returns approximate center and zoom level for the imagery set
 */
export declare function getImageryCenterZoom(imagery: ConfigImagery | ConfigImagery[], previewSize?: Size): {
    lat: number;
    lon: number;
    zoom: number;
};
/**
 * Create a slug for a location that can be used in basemaps links and is human readable
 *
 * in the format `@${lat},${lon},z${llz.zoom}`;
 *
 * @example "@-36.5518610,174.8770907,z8"
 * @param llz
 * @returns
 */
export declare function toSlug(llz: {
    lat: number;
    lon: number;
    zoom: number;
}): string;
export interface PreviewConfig {
    /** imagery to create a preview URL for */
    imagery: ConfigImagery;
    /** output preview size */
    size?: Size;
    /** optional configuration location */
    config?: string;
    /** optional pipeline to use */
    pipeline?: string;
}
export interface PreviewResult {
    /**
     * relative URL to the preview location
     *
     * @example
     *
     * "/v1/preview/..."
     */
    url: string;
    /**
     * standardized name of the layer
     */
    name: string;
    /**
     * location slug useful for basemaps links
     *
     * @example "@-36.5518610,174.8770907,z8"
     */
    slug: string;
    /**
     * Components of the slug broken out into their parts
     */
    location: {
        lat: number;
        lon: number;
        zoom: number;
    };
    /**
     * Query string parameters for t he preview including config and pipeline if needed
     *
     * @example
     * "?config=s3://...&pipeline=terrain-rgb"
     */
    query: string;
}
export declare function getPreviewUrl(ctx: PreviewConfig): PreviewResult;
/**
 * Create a query string for a preview URL using pipeline and configuration if they are needed
 *
 * @param ctx
 * @returns a query string prefixed with `?` if it is needed, empty string otherwise
 */
export declare function getPreviewQuery(ctx: {
    config?: string | null;
    pipeline?: string | null;
}): string;