import Coordinate from '../Coordinate';
declare const common: {
    /**
     * 测量两点之间的距离
     *
     * @english
     * Measure length between coordinate c1 and coordinate c2
     * @param c1 coordinate
     * @param c2 coordinate
     * @returns length
     */
    measureLength: (c1: Coordinate, c2: Coordinate) => number;
};
export type CommonMeasurer = typeof common;
/**
 * 这提供了用于通用测量器的方法。 它是一个 mixin，不适合直接使用。
 * @english
 * This provides methods used for common measurer. It's a mixin and not meant to be used directly.
 * @mixin Common
 * @group measurer
 * @protected
 */
export default common;
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