onderaltintas

// Creates polar arc coordinates with given x0, y0 center coordinates, radius, start angle(polar degree north = 0),
// end angle, number of segments.
function createPolarArc(xO,yO,r,startAngle,endAngle,stepSize)
{
	var ring = [];
	ring.push([xO,yO])
	var cartesianStartAngle = 90 - startAngle;
	if(startAngle > endAngle)
	{
		cartesianStartAngle = (360 + cartesianStartAngle)%360

onderaltintas

--This program is free software: you can redistribute it and/or modify
--it under the terms of the GNU General Public License as published by
--the Free Software Foundation, either version 3 of the License, or
--(at your option) any later version.

--This program is distributed in the hope that it will be useful,
--but WITHOUT ANY WARRANTY; without even the implied warranty of
--MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
--GNU General Public License for more details.

onderaltintas

/*
The MIT License (MIT)

Copyright (c) 2013 Önder ALTINTAŞ

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is

onderaltintas

var degrees2meters = function(lon,lat) {
  var x = lon * 20037508.34 / 180;
  var y = Math.log(Math.tan((90 + lat) * Math.PI / 360)) / (Math.PI / 180);
  y = y * 20037508.34 / 180;
  return [x, y]
}
//test
lon= -77.035974
lat = 38.898717