import type { FeatureIterator, VectorFeatures, Writer } from '../../index.js';
/** User defined options on how to store the features */
export interface ToCSVOptions {
    /** The delimiter to use to separate lines [Default=','] */
    delimiter?: string;
    /** The lineDelimiter to use to separate lines [Default='\n'] */
    lineDelimiter?: string;
    /** If provided the lookup of the longitude [Default='lon'] */
    lonKey?: string;
    /** If provided the lookup of the latitude [Default='lat'] */
    latKey?: string;
    /** If provided the lookup for the height value [Default=undefined] */
    heightKey?: string;
    /** List of parameters to include in the feature */
    properties?: string[];
    /** handle each feature */
    onFeature?: (feature: VectorFeatures) => VectorFeatures | undefined;
}
/**
 * # CSV Writer
 *
 * ## Description
 * Given a writer and an array of iterators, write the input features to the writer as a CSV data
 *
 * ## Usage
 * ```ts
 * import { toCSV, JSONReader } from 'gis-tools-ts';
 * import { FileReader, FileWriter } from 'gis-tools-ts/file';
 * // or use mmap reader if using bun
 * // import { MMapReader } from 'gis-tools-ts/mmap';
 *
 * const fileReader = new FileReader(`${__dirname}/fixtures/points.geojson`);
 * const jsonReader = new JSONReader(fileReader);
 * const bufWriter = new FileWriter(`${__dirname}/fixtures/points.csv`);
 *
 * // store to singular output
 * await toCSV(bufWriter, [jsonReader], { properties: ['name'] });
 * ```
 *
 * @param writer - the writer to append strings to
 * @param iterators - the collection of iterators to write
 * @param opts - user defined options [optional]
 */
export declare function toCSV(writer: Writer, iterators: FeatureIterator[], opts?: ToCSVOptions): Promise<void>;
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