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Higher education  
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Landforms/geography  
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This interactive is a graphical introduction to geospatial images from NASA Earth science satellites and encourages exploration of the interconnected nature of Earth’s system by students and the public alike. Explore 25 different Earth images and... (View More)

Audience: Higher education, Informal education
Materials Cost: Free

This chapter describes how to set a scale and measure distances and areas on satellite images. Using ImageJ, a freely available image analysis program that runs on most operating systems, users set the spatial calibration of an image, then select... (View More)

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