Eyes in the Sky II > GIT Web Course > Module 3 > Week 11 > Using ImageJ to Detect Change

Week 11: Using Satellite Data to Investigate Deforestation

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Using ImageJ to Detect Change

amazon_deforestation_2009 Clearing of the Amazon rainforest in Rondonia in August of 2009.

Investigation questions:

One of the most deforested parts of the Amazon rainforest lies within the state of Rondonia in Brazil. The loss of the rainforest is primarily due to human activities such as raising crops and livestock. Unfortunately, although these activities have short-term benefits to people, over time, the loss of the rainforest can lead to the extinction of plants and animals as well as contribute to global climate change.

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Download Images of Deforestation

Download three images of deforestation to your Week 11 folder or directory. These images show deforestation in the Amazon rainforest during the years 2001, 2005, and 2009.

  1. Click the thumbnail image below to open a full-size version in a separate window. Then right-click (Win) or control-click (Mac) the full-size image to choose File > Save Image As... and save it to your Week 11 folder. Close the image window after you have downloaded its file.
    • amazon_deforestation_2001 amazon_deforestation_2001.jpg
  2. Repeat the procedure for the 2005 image.
    • amazon_deforestation_2005 amazon_deforestation_2005.jpg
  3. Then repeat the procedure once more for the 2009 image.
    • amazon_deforestation_2009 amazon_deforestation_2009.jpg

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Launch ImageJ and Import the Images as a Stack

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Animate and Explore the Stack to Observe Change Over Time

You can step through a stack one slice at a time, or you can animate it like a repeating movie loop.

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Process the Stack for Analysis

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Measure the Area of Deforestation Each Year

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Create an RGB Color Image from the Stack

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Interpret Results

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