mdbauman

<?php
//based on albers.js by Tom Carden https://gist.github.com/RandomEtc/476238
//ex. for a 954.66669*601.46283pt SVG of contiguous US, I used:
//    $albers = new Albers([23.0,-96.0], [29.5, 45.5]);
//    $coords = $albers->project($lat,$long);
//    $coords = ['x'=>$coords['x']*1315+485, 'y'=>$coords['y']*1315+654]; //scale and translate
class Albers{
    
    private static $origin, $parallels, $n, $c, $C, $p0, $lat0, $lng0, $phi1, $phi2;
    private $t, $p;