https://github.com/CartoDB/torque

Temporal mapping for CARTO
https://github.com/CartoDB/torque

Last synced: 5 days ago
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Temporal mapping for CARTO

• Host: GitHub
• URL: https://github.com/CartoDB/torque
• Owner: CartoDB
• License: bsd-4-clause
• Created: 2012-09-26T23:20:04.000Z (about 12 years ago)
• Default Branch: master
• Last Pushed: 2022-12-08T11:15:59.000Z (almost 2 years ago)
• Last Synced: 2024-11-07T09:14:29.477Z (5 days ago)
• Language: JavaScript
• Homepage: http://cartodb.github.com/torque/
• Size: 6.24 MB
• Stars: 397
• Watchers: 116
• Forks: 130
• Open Issues: 57
• Metadata Files:
  • Readme: README.md
  • Contributing: CONTRIBUTING.md
  • License: LICENSE.txt

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README

        
Torque

==

[![Build Status](https://travis-ci.org/CartoDB/torque.svg?branch=master)](https://travis-ci.org/CartoDB/torque)

Render big, timeseries data in the client. Uses CartoDB to generate a datacube format. For a brief introduction to the format and methods, see our [presentation slides](http://gijs.github.com/images/cartodb_datacubes.pdf)

CartoDB users can use this code right away. Specify your username/tablename and datecolumn to get mapping time immediatley.

Have fun!

* Play with your own data: http://cartodb.github.com/torque/

* The Guardian's Data Blog write-up of Royal Navy ships in WWI: http://www.guardian.co.uk/news/datablog/interactive/2012/oct/01/first-world-war-royal-navy-ships-mapped

* A car in Nürburgring track: http://cartodb.github.com/torque/examples/car.html

## Torque library reference

Torque lets you render big, timeseries or categorical data in the client. This is useful for many modern applications that need more than just a static map. Early versions of Torque have been used to visualize human movement, Twitter activity, biodiversity data, and many more large-scale datasets.

The library uses CartoDB to generate a [layercube](https://github.com/CartoDB/tilecubes/blob/master/2.0/spec.md) format. For a brief introduction to the format and methods, see our [presentation slides](http://gijs.github.com/images/cartodb_datacubes.pdf). If you are not using CartoDB to host your data, you can modify the input parameters to point toward any layercube service.

### Getting started

The simplest way to use a visualization with Torque is...

#### Create a simple Torque visualization

```javascript

  ...

  

    


    ...

    

      // define the torque layer style using cartocss

      var CARTOCSS = [

          'Map {',

          '-torque-time-attribute: "date";',

          '-torque-aggregation-function: "count(cartodb_id)";',

          '-torque-frame-count: 760;',

          '-torque-animation-duration: 15;',

          '-torque-resolution: 2',

          '}',

          '#layer {',

          '  marker-width: 3;',

          '  marker-fill-opacity: 0.8;',

          '  marker-fill: #FEE391; ',

          '  comp-op: "lighten";',

          '  [value > 2] { marker-fill: #FEC44F; }',

          '  [value > 3] { marker-fill: #FE9929; }',

          '  [value > 4] { marker-fill: #EC7014; }',

          '  [value > 5] { marker-fill: #CC4C02; }',

          '  [value > 6] { marker-fill: #993404; }',

          '  [value > 7] { marker-fill: #662506; }',

          '  [frame-offset = 1] { marker-width: 10; marker-fill-opacity: 0.05;}',

          '  [frame-offset = 2] { marker-width: 15; marker-fill-opacity: 0.02;}',

          '}'

      ].join('\n');


        

      var map = new L.Map('map', {

        zoomControl: true,

        center: [40, 0],

        zoom: 3

      });

      L.tileLayer('http://{s}.api.cartocdn.com/base-dark/{z}/{x}/{y}.png', {

        attribution: 'CartoDB'

      }).addTo(map);

      var torqueLayer = new L.TorqueLayer({

        user       : 'viz2',

        table      : 'ow',

        cartocss: CARTOCSS

      });

      torqueLayer.addTo(map);

      torqueLayer.play()

    

  

```

[Grab the complete example source code](https://github.com/CartoDB/torque/blob/master/examples/navy_leaflet.html)



### API

[see reference](https://github.com/CartoDB/torque/blob/master/doc/API.md)