The document discusses the use of satellite imagery and various remote sensing techniques for environmental monitoring, focusing on the capabilities of different satellites such as Landsat and Sentinel. It highlights the spectral signatures used to analyze land cover changes, vegetation, and air pollution effects. Additionally, the author offers freelance services in geographic data analysis and Python programming.

1. Monitoring the
environment from space
Dr Robin Wilson - www.rtwilson.com

3. In Out

4. Blue Green
Red

5. 19 56 86 92 125 135 56 28 69
Picture Elements – or ‘Pixels’

8. Spectral Signatures
Blue Green Red

11. Landsat 8

12. Landsat – 30m – 2 weeks

13. Landsat – 30m – 2 weeks

14. Sentinel 2 – 10m – 5 days

15. IKONOS – 4m – on-demand

16. IKONOS – 4m – on-demand

17. MODIS – 1km – twice daily

21. Bands
Visible Near-IR SWIR

27. Spectral Signatures

28. Spectral Signatures
Look at each pixel:
which graph is most similar to that pixel?

29. Blue
Red

30. CORINE Land Cover

31. CORINE Land CoverCORINE Land Cover

33. Forest change

34. Forest loss

35. Bands
Visible Near-IR Far-IR

37. Blue

38. Green

39. Red

40. Near Infra-red

41. True Colour Composite
R: R G: G B: B

42. False Colour Composite
R: NIR G: R B: G

43. SWIR/NIR Composite
R: NIR G: SWIR B: B

45. In
Out

48. Landsat NDVI

49. Landsat NDVI

50. 0.5m True Colour

51. 0.5m False Colour
R: NIR G: R B: G

52. 0.5m NDVI

54. MERIS – 300m vegetation

55. Early March Late March
Early April Late April

60. Visible IR Far-IR

68. ObjectPixel
Minimum
Maximum
Average
Shape of object
Neighbours
Texture
Single value for
each band
for
each
band

69. Earthquake example

71. Beijing - Jan 2013

72. Over 3 million people die
prematurely each year from
particulate matter air pollution

73. In
Out
Rayleigh
Scattering

74. In
Out
Mie
Scattering

91. ASTER Global DEM – 30m

94. EA LiDAR data – 1m

95. EA LiDAR data – 1m

96. Sea Surface Temperature

97. Nighttime Lights

98. Landsat image – Forested Wetlands

99. Radar image – Forested Wetlands

101. Thank you
Any questions?
I do freelance work in geographic data
analysis, data science and Python
programming – speak to me for details or
see www.rtwilson.com