import { GeometryType, Geometry, Point } from "./internal";
/**
 * The base type for all 1-dimensional geometry types. A 1-dimensional geometry
 * is a geometry that has a length, but no area. A curve is considered simple if
 * it does not intersect itself (except at the start and end point). A curve is
 * considered closed its start and end point are coincident. A simple, closed
 * curve is called a ring.
 */
export declare abstract class Curve extends Geometry {
    /**
     * Constructor
     * @param type geometry type
     * @param hasZ has z
     * @param hasM has m
     */
    protected constructor(type: GeometryType, hasZ: boolean, hasM: boolean);
    /**
     * Get the start Point of this Curve
     *
     * @return start point
     */
    abstract startPoint(): Point;
    /**
     * Get the end Point of this Curve
     *
     * @return end point
     */
    abstract endPoint(): Point;
    /**
     * Determine if this Curve is closed (start point = end point)
     * @return true if closed
     */
    isClosed(): boolean;
    /**
     * Check for curve equality
     */
    abstract equals(obj: Geometry): boolean;
}