src/main/webapp/resources/js/map/usa_states.js

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/*!
 *
 * Jquery Mapael - Dynamic maps jQuery plugin (based on raphael.js)
 * Requires jQuery and Mapael
 *
 * Map of USA by state
 * 
 * @source http://the55.net/_11/sketch/us_map
 */
(function (factory) {
    if (typeof exports === 'object') {
        // CommonJS
        module.exports = factory(require('jquery'), require('jquery-mapael'));
    } else if (typeof define === 'function' && define.amd) {
        // AMD. Register as an anonymous module.
        define(['jquery', 'mapael'], factory);
    } else {
        // Browser globals
        factory(jQuery, jQuery.mapael);
    }
}(function ($, Mapael) {

    "use strict";
    
    $.extend(true, Mapael,
        {
            maps :{
                usa_states : {
                    width : 959,
                    height : 593,
                    latLngToGrid: function(lat, lng, phi1, phi2, midLng, scale) {
                        var pi =Math.PI
                            , midLat = (phi1 + phi2) / 2
                            , n, tmp1, tmp2, tmp3, x, y, p;

                        n = (Math.sin(phi1 / 180 * pi) + Math.sin(phi2 / 180 * pi)) / 2;
                        tmp1 = Math.sqrt(Math.cos(phi1 / 180 * pi)) + 2 * n * Math.sin(phi1 / 180 * pi);
                        tmp2 = scale * Math.pow(tmp1 - 2 * n * Math.sin(midLat / 180 * pi),0.5) / n;
                        tmp3 = n * (lng - midLng);
                        p = scale * Math.pow(tmp1 - 2 * n * Math.sin(lat / 180 * pi),0.5) / n;
                        x = p * Math.sin(tmp3 / 180 * pi);
                        y = tmp2 - p * Math.cos(tmp3 / 180 * pi);
                        
                        return([x,y]);
                    },
                    getCoords : function (lat, lon) {
                        var coords = {},
                            xOffset,
                            yOffset,
                            scaleX,
                            scaleY,
                            phi1,
                            phi2,
                            midLng,
                            scale;
                        if(lat > 51) { // alaska
                            phi1= 15;
                            phi2= 105;
                            midLng = -134;
                            scale = 530;