aemkei/LICENSE.txt

## README.md

      
    Raw
  

              README.md
            
          
    Mercator Projection - 140byt.es

Converts a point from latitude/longitude to pixel coordinates using the Mercator projection.
Demo: http://jsfiddle.net/aemkei/Ls4QU/show/
Usage

mercator(
  latitude, longitude,
  zoomLevel,
  tileSize
)

// returns {x,y} coordinates
Author

Created by Martin Kleppe (@aemkei) at Ubilabs.
DIY

Check his "JavaScript Golf Lessons" slides.
For more information

See the 140byt.es site for a showcase of entries (built itself using 140-byte entries!), and follow @140bytes on Twitter.

  
## annotated.js
function(
  a, b, // latitude, longitude
  c, // zoom
  d, // tile size
  e // placeholder
){
  return e = Math,
    a = e.sin(a * e.PI / 180), // sin latitude
    c = d * e.pow(2, c), // scale factor
    {
      x: (b / 360 + .5) * c, // x position
      y: (.5 - e.log((1 + a) / (1-a)) / (4 * e.PI)) * c // y position
    }
}

## index.js
function(a,b,c,d,e){return e=Math,a=e.sin(a*e.PI/180),c=d*e.pow(2,c),{x:(b/360+.5)*c,y:(.5-e.log((1+a)/(1-a))/(4*e.PI))*c}}

## LICENSE.txt
            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
                    Version 2, December 2004

 Copyright (C) 2011 YOUR_NAME_HERE <YOUR_URL_HERE>

 Everyone is permitted to copy and distribute verbatim or modified
 copies of this license document, and changing it is allowed as long
 as the name is changed.

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. You just DO WHAT THE FUCK YOU WANT TO.

## package.json
{
  "name": "mercator",

  "description": "Converts a geographic location from latitude/longitude into pixel coordinates.",

  "keywords": [
    "maps",
    "geo",
    "mercator",
    "projection"
  ]
}

## test.html
<!DOCTYPE html>
<head>
  <title>Mercator Projection</title>
  <style type="text/css" media="screen">
    html, body { margin: 0;}
    .map { position: relative; }
    .map div { position: absolute; width: 8px; height: 8px; margin: -5px; background: #F00; border: 1px solid #FFF; }
  </style>
</head>
<body>
  <div class="map">
    <img src="http://maps.googleapis.com/maps/api/staticmap?center=0,0&amp;zoom=1&amp;size=512x512&amp;maptype=roadmap&amp;sensor=false">
    <div id="nyc" title="New York"></div>
    <div id="rio" title="Rio"></div>
    <div id="tokyo" title="Tokyo"></div>
  </div>
  <script>
    var mercator = function(a,b,c,d,e){return e=Math,a=e.sin(a*e.PI/180),c=d*e.pow(2,c),{x:(b/360+.5)*c,y:(.5-e.log((1+a)/(1-a))/(4*e.PI))*c}},
      city, style, coords, xy,
      cities = {
        nyc:   { lat:  40.714997, lng: -74.005966 },
        rio:   { lat: -22.878706, lng: -43.207855 },
        tokyo: { lat:  35.713068, lng: 139.685669 }
      };

    for (city in cities){
      style = document.getElementById(city).style;
      coords = cities[city];
      xy = mercator(coords.lat, coords.lng, 0, 512);
      style.top = xy.y + "px";
      style.left = xy.x + "px";
    }
  </script>
</body>
	function(
	a, b, // latitude, longitude
	c, // zoom
	d, // tile size
	e // placeholder
	){
	return e = Math,
	a = e.sin(a * e.PI / 180), // sin latitude
	c = d * e.pow(2, c), // scale factor
	{
	x: (b / 360 + .5) * c, // x position
	y: (.5 - e.log((1 + a) / (1-a)) / (4 * e.PI)) * c // y position
	}
	}
	DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
	Version 2, December 2004

	Copyright (C) 2011 YOUR_NAME_HERE <YOUR_URL_HERE>

	Everyone is permitted to copy and distribute verbatim or modified
	copies of this license document, and changing it is allowed as long
	as the name is changed.

	DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
	TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

	0. You just DO WHAT THE FUCK YOU WANT TO.
	{
	"name": "mercator",

	"description": "Converts a geographic location from latitude/longitude into pixel coordinates.",

	"keywords": [
	"maps",
	"geo",
	"mercator",
	"projection"
	]
	}
	<!DOCTYPE html>
	<head>
	<title>Mercator Projection</title>
	<style type="text/css" media="screen">
	html, body { margin: 0;}
	.map { position: relative; }
	.map div { position: absolute; width: 8px; height: 8px; margin: -5px; background: #F00; border: 1px solid #FFF; }
	</style>
	</head>
	<body>
	<div class="map">
	<img src="http://maps.googleapis.com/maps/api/staticmap?center=0,0&zoom=1&size=512x512&maptype=roadmap&sensor=false">
	<div id="nyc" title="New York"></div>
	<div id="rio" title="Rio"></div>
	<div id="tokyo" title="Tokyo"></div>
	</div>
	<script>
	var mercator = function(a,b,c,d,e){return e=Math,a=e.sin(ae.PI/180),c=de.pow(2,c),{x:(b/360+.5)c,y:(.5-e.log((1+a)/(1-a))/(4e.PI))*c}},
	city, style, coords, xy,
	cities = {
	nyc: { lat: 40.714997, lng: -74.005966 },
	rio: { lat: -22.878706, lng: -43.207855 },
	tokyo: { lat: 35.713068, lng: 139.685669 }
	};

	for (city in cities){
	style = document.getElementById(city).style;
	coords = cities[city];
	xy = mercator(coords.lat, coords.lng, 0, 512);
	style.top = xy.y + "px";
	style.left = xy.x + "px";
	}
	</script>
	</body>