geolib/es/getRhumbLineBearing.js

Library to provide basic geospatial operations like distance calculation, decoding of sexagesimal coordinates etc.

"use strict";Object.defineProperty(exports,"__esModule",{value:true});exports.default=void 0;var _getLatitude=_interopRequireDefault(require("./getLatitude"));var _getLongitude=_interopRequireDefault(require("./getLongitude"));var _toRad=_interopRequireDefault(require("./toRad"));var _toDeg=_interopRequireDefault(require("./toDeg"));function _interopRequireDefault(e){return e&&e.__esModule?e:{default:e}}const getRhumbLineBearing=(origin,dest)=>{let diffLon=(0,_toRad.default)((0,_getLongitude.default)(dest))-(0,_toRad.default)((0,_getLongitude.default)(origin));const diffPhi=Math.log(Math.tan((0,_toRad.default)((0,_getLatitude.default)(dest))/2+Math.PI/4)/Math.tan((0,_toRad.default)((0,_getLatitude.default)(origin))/2+Math.PI/4));if(Math.abs(diffLon)>Math.PI){if(diffLon>0){diffLon=(Math.PI*2-diffLon)*-1}else{diffLon=Math.PI*2+diffLon}}return((0,_toDeg.default)(Math.atan2(diffLon,diffPhi))+360)%360};var _default=exports.default=getRhumbLineBearing;