Earth Analysis Techniques > Image Analysis Modules > Introduction to Image Analysis > Day 1—Use Images to Analyze Earth > Part 2: Explore and Investigate Digital Images to Develop an Understanding of Their Properties

Part 2: Explore and Investigate Digital Images to Develop an Understanding of Their Properties2

Download a Greyscale and a Color Image

Download these two images of Lake Mead.

  1. Click the grayscale 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 Day 1 folder. Close the image window after you have downloaded its file.
    • Lake Mead 2004 grayscale small, with scale bar lake_mead_2004_grayscale.jpg
  2. Then repeat the procedure for the color image of Lake Mead.
    • Lake Mead 2004 color small, with scale bar lake_mead_2004_color.jpg
  3. Read this NASA Earth Observatory article to find out about the Lake Mead image .

Explore a Digital Image


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