|---|---|---|---|
| ![global](https://developers.google.com/static/earth-engine/images/Tutorial_hansen_011.png) | ![Indonesia](https://developers.google.com/static/earth-engine/images/Tutorial_hansen_012.png) | ![Paraguay](https://developers.google.com/static/earth-engine/images/Tutorial_hansen_013.png) | ![Legend](https://developers.google.com/static/earth-engine/images/Tutorial_hansen_014.png) |

Figure 1. Forest change estimated by Hansen et al. (2013). Global Change, 2000 - 2012 (left); Change in Riau, Indonesia, 2000 - 2012 (center); Change in Paraguay, 2000 - 2012 (right)

Welcome to the Google Earth Engine tutorial for using
[Hansen et al. (2013)](http://www.sciencemag.org/content/342/6160/850) global
forest cover and change data and Forest Monitoring for Action (FORMA,
[Hammer
et al. 2009](https://www.cgdev.org/sites/default/files/1423248_file_Hammer_Kraft_Wheeler_FORMA_FINAL.pdf)) data from [Global Forest
Watch](http://www.globalforestwatch.org/). This tutorial provides examples of how to use Earth Engine to visualize these
data, how to compute forest change over time and other statistics within a region of
interest, and how to download both the data and results of analyses.

## License and Attribution

![CC 4.0](https://developers.google.com/static/earth-engine/images/Tutorial_hansen_02_cc_license.png)

The data described in this tutorial are licensed under a Creative
Commons Attribution 4.0 International License. Please use the recommended citation on
the relevant [dataset description
page](https://developers.google.com/earth-engine/datasets).

## Prerequisites

The tutorial assumes no programming background, although it does assume a willingness to
learn some programming. Before proceeding, please make sure to:

- [Sign up for Earth Engine](https://signup.earthengine.google.com). Once you have been accepted, you will receive an email with additional information.
- Get familiar with the [Earth
  Engine Code Editor](https://code.earthengine.google.com), the IDE for writing Earth Engine JavaScript code in a web browser. Learn more about the Code Editor [here](https://developers.google.com/earth-engine/guides/playground).
- If you are unfamiliar with JavaScript, check out the [JavaScript for Earth Engine tutorial](https://developers.google.com/earth-engine/tutorials/tutorial_js_01).
- If you are unfamiliar with the Earth Engine API, check out the [Introduction to the Earth Engine API](https://developers.google.com/earth-engine/tutorials/tutorial_api_01) tutorial.

Once you're familiar with JavaScript, the Earth Engine API, and the Code Editor,
[get started on the tutorial](https://developers.google.com/earth-engine/tutorials/tutorial_forest_02)!