Upgrade to Pro — share decks privately, control downloads, hide ads and more …

Lecture Slides: Intro to Remote Sensing and Electromagnetic Energy

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.

Joshua Stevens

December 03, 2014
Tweet

More Decks by Joshua Stevens

Other Decks in Education

Transcript

  1. GEOG 160 November 10, 2014
    Mapping Our Changing World
    Joshua Stevens
    [email protected]
    Office: 210 Walker
    Hours: Tues 11-12
    Fri 10-11

    View Slide

  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

    View Slide

  3. ….not to be confused with “remote viewing”

    View Slide

  4. Landsat 8 data acquired October 24, 2014

    View Slide

  5. View Slide

  6. © McMath-Pierce Solar Observatory
    Frequency of Colors Emitted by the Sun

    View Slide

  7. © Immunolight
    The Electromagnetic (EM) Spectrum

    View Slide

  8. View Slide

  9. © NASA

    View Slide

  10. © NASA

    View Slide

  11. © NASA

    View Slide

  12. View Slide

  13. © NASA

    View Slide

  14. © NASA

    View Slide

  15. © NASA

    View Slide

  16. © NASA

    View Slide

  17. True Color © NASA

    View Slide

  18. False Color - SWIR w/ stretch © NASA

    View Slide

  19. False Color - Thermal w/ stretch © NASA

    View Slide

  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

    View Slide

  21. Electromagnetic (EM) Spectrum

    View Slide

  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

    View Slide

  23. Electromagnetic Energy Emission

    View Slide

  24. Electromagnetic Energy Emission

    View Slide

  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:

    View Slide

  26. View Slide

  27. Interpreting Remote Sensing Imagery Requires Skill
    • Elements of Image Interpretation
    • Size
    • Shape
    • Tone/Color
    • Pattern
    • Shadow
    • Texture
    • Association
    • Site

    View Slide

  28. Element of Interpretation: Size

    View Slide

  29. Element of Interpretation: Shape

    View Slide

  30. Element of Interpretation: Tone

    View Slide

  31. Element of Interpretation: Pattern

    View Slide

  32. Element of Interpretation: Pattern

    View Slide

  33. Element of Interpretation: Shadow

    View Slide

  34. Element of Interpretation: Texture

    View Slide

  35. Element of Interpretation: Association

    View Slide

  36. Element of Interpretation: Association

    View Slide

  37. Element of Interpretation: Site

    View Slide

  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

    View Slide