import { Feature, LineString, Polygon } from '@turf/turf';
import { IAreaOptions, IDashLineFeature, IDistanceOptions, ILineFeature, ITextFeature, ITextProperties } from '../typings';
/**
 * 将数字转四舍五入为目标精度位数的数字
 * @param num
 * @param precision
 * @returns
 */
export declare const getPrecisionNumber: (num: number, precision?: number) => number;
/**
 * 获取线段的中心点Feature
 * @param feature
 */
export declare const getLineCenterPoint: (feature: Feature<LineString>) => Feature<import("@turf/turf").Point, import("@turf/turf").Properties>;
/**
 * 返回线段对应的距离文本
 * @param feature
 * @param showTotalDistance
 * @param format
 * @param properties
 */
export declare const calcDistanceTextsByLine: (feature: ILineFeature | IDashLineFeature, { showTotalDistance, format, }: Pick<IDistanceOptions, 'showTotalDistance' | 'format'>, properties?: Partial<ITextProperties>) => ITextFeature[];
/**
 * 根据传入的polygon和options配置获取面积文本Feature
 * @param feature
 * @param options
 * @param properties
 */
export declare const calcAreaText: (feature: Feature<Polygon>, options: Pick<IAreaOptions, 'format'>, properties?: Partial<ITextProperties>) => ITextFeature;