measurer.Identity

measurer.Identity is a measurer based on a Cartesian coordinate system, mixing in measurer.Common. It computes length with the planar distance formula and area with the shoelace formula, suitable for flat-surface coordinate systems such as indoor maps and game maps. It is an object mixin with no standalone constructor.

import { measurer } from "maptalks";

const m = measurer.Measurer.getInstance("IDENTITY");
m.measureLenBetween([0, 0], [3, 4]); // 5

Properties / Static Methods

• measure: string — The measurer code, 'IDENTITY'.

Methods

• measureLenBetween(c1, c2, ignoreAltitude?): number — Euclidean distance between two planar coordinates.
• measureArea(coords): number — Closed area of a planar geometry (absolute value).
• locate(c, xDist, yDist, out?): Coordinate — Locate a coordinate from a source coordinate by x-axis and y-axis distances.
• rotate(c, pivot, angle): Coordinate — Rotate a coordinate around a pivot by a given angle (degrees).
• Additionally inherits measureLength from measurer.Common.