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Lecture Slides: Intro to Remote Sensing and Electromagnetic Energy

2d2d0ca46828932e67f253425121e48c?s=47 Joshua Stevens
December 03, 2014

Lecture Slides: Intro to Remote Sensing and Electromagnetic Energy

These slides are provided as an example of my lecture material for GEOG 160 (Fall 2014) at The Pennsylvania State University.

The topics covered include remote sensing, an introduction to the electromagnetic spectrum, and properties of image interpretation.

2d2d0ca46828932e67f253425121e48c?s=128

Joshua Stevens

December 03, 2014
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  1. GEOG 160 November 10, 2014 Mapping Our Changing World Joshua

    Stevens josh.stevens@psu.edu Office: 210 Walker Hours: Tues 11-12 Fri 10-11
  2. This Week • Update: Quiz 6 (Ch 6 & 7)

    will open today! • You will have until Sunday @ 11:59pm to complete it. • Begin Chapter 7: Remote Sensing
  3. ….not to be confused with “remote viewing”

  4. Landsat 8 data acquired October 24, 2014

  5. None
  6. © McMath-Pierce Solar Observatory Frequency of Colors Emitted by the

    Sun
  7. © Immunolight The Electromagnetic (EM) Spectrum

  8. None
  9. © NASA

  10. © NASA

  11. © NASA

  12. None
  13. © NASA

  14. © NASA

  15. © NASA

  16. © NASA

  17. True Color © NASA

  18. False Color - SWIR w/ stretch © NASA

  19. False Color - Thermal w/ stretch © NASA

  20. Two General Types of Remote Sensing • Space Borne: Satellites

    acquire the images; often under continuous use • Aerial imaging systems: Uses aircraft to collect images; usually flown on-demand
  21. Electromagnetic (EM) Spectrum

  22. Electromagnetic (EM) Spectrum Our eyes can only see a small

    portion of this energy Visible wavelengths: around 390 nm - 700 nm 700 nm 390 nm
  23. Electromagnetic Energy Emission

  24. Electromagnetic Energy Emission

  25. Just as the sun emits energy unevenly across the spectrum,

    our eyes are not equally sensitive to every color. We are much more sensitive to greens and reds. Side note:
  26. None
  27. Interpreting Remote Sensing Imagery Requires Skill • Elements of Image

    Interpretation • Size • Shape • Tone/Color • Pattern • Shadow • Texture • Association • Site
  28. Element of Interpretation: Size

  29. Element of Interpretation: Shape

  30. Element of Interpretation: Tone

  31. Element of Interpretation: Pattern

  32. Element of Interpretation: Pattern

  33. Element of Interpretation: Shadow

  34. Element of Interpretation: Texture

  35. Element of Interpretation: Association

  36. Element of Interpretation: Association

  37. Element of Interpretation: Site

  38. Next Class • We’ll talk about different types of satellites

    and their missions • Image correction and classification • Computed derivatives of sat. data • Why ‘Doomsday Preppers’ wouldn’t exist if they knew about remote sensing