EndPointCorp/webgl-globe

Name: webgl-globe

Owner: End Point Corporation

Description: WebGL Globe is a platform for visualizing latitude longitude based information using WebGL.

Created: 2013-12-16 22:26:05.0

Updated: 2013-12-31 00:05:51.0

Pushed: 2013-12-31 00:05:50.0

Homepage: http://www.chromeexperiments.com/globe

Size: 41378

Language: JavaScript

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README

The WebGL Globe is an open platform for geographic data visualization created by the Google Data Arts Team. We encourage you to copy the code, add your own data, and create your own globes.

Check out the examples at http://www.chromeexperiments.com/globe, and if you create a globe, please share it with us. We post our favorite globes publicly.

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The WebGL Globe supports data in JSON format, a sample of which you can find here. webgl-globe makes heavy use of the Three.js library.

Data Format

The following illustrates the JSON data format that the globe expects:

data = [
[
'seriesA', [ latitude, longitude, magnitude, latitude, longitude, magnitude, ... ]
],
[
'seriesB', [ latitude, longitude, magnitude, latitude, longitude, magnitude, ... ]
]

Basic Usage

The following code polls a JSON file (formatted like the one above) for geo-data and adds it to an animated, interactive WebGL globe.

here to put the globe?
container = document.getElementById( 'container' );

ake the globe
globe = new DAT.Globe( container );

e're going to ask a file for the JSON data.
xhr = new XMLHttpRequest();

here do we get the data?
open( 'GET', 'myjson.json', true );

hat do we do when we have it?
onreadystatechange = function() {

// If we've received the data
if ( xhr.readyState === 4 && xhr.status === 200 ) {

    // Parse the JSON
    var data = JSON.parse( xhr.responseText );

    // Tell the globe about your JSON data
    for ( var i = 0; i < data.length; i ++ ) {
        globe.addData( data[i][1], 'magnitude', data[i][0] );
    }

    // Create the geometry
    globe.createPoints();

    // Begin animation
    globe.animate();

}



egin request
send( null );