Maps, Graphs, and Data

Using Landsat to Spot Changes in Land Use | NASA Space Earth Science Video

Landsat Image and Graph

Learn how Landsat data are used to detect changes in land use. This video describes how the data are interpreted and gives examples of changes in forests from different insects and differences due to land management.

Mini Lesson

This video shows a combination of visualizations made from LandSat data. These data are numbers which are shown on the visualizations as different colors in specific geographic locations. The result looks like a map with different colors. The different colors represent different types of land cover. Animating the visualizations over time can show how the land is changing over time. 

Watch the video one time to get a general idea of what is being discussed paying close attention to the visualizations. Then, give the students the questions about the three events that occurred. Watch the video again paying close attention to the details on the graphs which accompany the visualizations. Stop the video at the following times for the events to better view the graphs.

  • Clear Cut 0:59 
  • Bark Beetle1:39
  • Western Spruce Budworm 1:55

Questions:

  • Clear Cut
    1. What was the trend in the Pacific Northwest before the clear cut?
    2. When did the clear cut in the Pacific Northwest occur?
    3. What happened after the clear cut?
  • Bark Beetle
    1. What was the trend in the forest before the Bark Beetle epidemic?
    2. When was the Bark Beetle epidemic?
    3. What happened after the Bark Beetle epidemic?
  • Western Spruce Budworm
    1. What was the trend in the forest before the Western Spruce Budworm infestation?
    2. When was the Western Spruce Budworm infestation?
    3. What happened after the Western Spruce Budworm infestation?
  • How do the graphs and the visualizations show the same information?

Sources: 

https://www.youtube.com/watch?time_continue=4&v=957LUMNrzmg