Prevent 180 and -180 degrees lon from wrapping and explain the rounded PI value in adjust_lon.js

var TWO_PI = Math.PI * 2;

// SPI is slightly greater than Math.PI, so values that exceed the -180..180

// degree range by a tiny amount don't get wrapped. This prevents points that

// have drifted from their original location along the 180th meridian (due to

// floating point error) from changing their sign.

var SPI = 3.14159265359;

var sign = require('./sign');

module.exports = function(x) {

  return (Math.abs(x) < Math.PI) ? x : (x - (sign(x) * TWO_PI));

  return (Math.abs(x) <= SPI) ? x : (x - (sign(x) * TWO_PI));

};

 No newline at end of file

    code:"+proj=krovak +lat_0=49.5 +lon_0=24.83333333333333 +alpha=30.28813972222222 +k=0.9999 +x_0=0 +y_0=0 +ellps=bessel +pm=greenwich +units=m +no_defs +towgs84=570.8,85.7,462.8,4.998,1.587,5.261,3.56",

    ll: [12.806988, 49.452262],

    xy: [-868208.61, -1095793.64]

  },

  // check that coordinates at 180 and -180 deg. longitude don't wrap around

  {

    code: 'EPSG:3857',

    ll: [-180, 0],

    xy: [-20037508.342789, 0]

  },

  {

    code: 'EPSG:3857',

    ll: [180, 0],

    xy: [20037508.342789, 0]

  }

];

if(typeof module !== 'undefined'){