Post on 27-Mar-2015
transcript
VIRISVIRISVVisible/IInfrarred IIntelligent SSpectrometer
White Pine Spectral Curve White Pine Spectral Curve & Landsat Band Regions& Landsat Band Regions
TM
1 (B
lue)
TM
2 (G
reen
)T
M3
(Red
)
TM
4 (N
IR)
TM
5 (M
IR)
TM
7 (M
IR)
Wat
er A
bso
rpti
on
Wat
er A
bso
rpti
on
Cellulose
Red
Ed
ge
NIR
3NIR
1
Leaf Pigments Cell Structure Water Content
Lig
nin
Red Edge Inflection Point (REIP)
Relationship Between Chlorophyll Concentration and REIP Values (Taken From Moss and Rock, 1991)
Chlorophyll Absorption
http://www.chm.bris.ac.uk/motm/chlorophyll/chlorophyll_h.htm
Spectral Indices
Spectral Indices
• REIP – The Red Edge Inflection Point, a strong indicator of Chlorophyll Content (the higher the number, the greater the amount);
Spectral Indices
• REIP – The Red Edge Inflection Point, a strong indicator of Chlorophyll Content (the higher the number, the greater the amount);
• NDVI – The Normalized Difference Vegetation Index, an indicator of “Greenness” (the higher the number, the greener the foliage);
Spectral Indices
• REIP – The Red Edge Inflection Point, a strong indicator of Chlorophyll Content (the higher the number, the greater the amount);
• NDVI – The Normalized Difference Vegetation Index, an indicator of “Greenness” (the higher the number, the greener the foliage);
• TM 5/4 Ratio – An indicator of Wetness or Dryness (the higher the number, the drier the foliage);
Spectral Indices
• REIP – The Red Edge Inflection Point, a strong indicator of Chlorophyll Content (the higher the number, the greater the amount);
• NDVI – The Normalized Difference Vegetation Index, an indicator of “Greenness” (the higher the number, the greener the foliage);
• TM 5/4 Ratio – An indicator of Wetness or Dryness (the higher the number, the drier the foliage);
• The NIR 3/1 Ratio – An indicator of Seasonal Development (the higher the number, the older the foliage).
VIRIS Comaprison of White Pine Health
0
10
20
30
40
50
60
70
80
400 600 800 1000 1200 1400 1600 1800 2000 2200 2400
Wavelength (nm)
% R
efle
ctan
ce
Senescent
Healthy
Unhealthy
© 2003 University of New Hampshire
Tree # Senescent Healthy Unhealthy
REIP 697.6 728.5 706.9
NDVI 0.401 0.842 0.825
TM54 0.632 0.499 0.451
NIR31 0.953 0.85 0.781
VIRIS Data - ComparisonsConiferous & Deciduous Species
0
10
20
30
40
50
60
70
80
90
100
400 600 800 1000 1200 1400 1600 1800 2000 2200 2400
Wavelength (nm)
% R
efle
ctan
ce Maple
Oak
Pine-1st yr
Pine-2nd yr
© 2003 University of New Hampshire
Tree # Maple Oak Pine-1st yr
Pine-2nd yr
REIP 728.5 723.9 722.3 720.8
NDVI 0.88 0.897 0.821 0.797
TM54 0.64 0.565 0.475 0.533
NIR31 0.877 0.83 0.813 0.865
Chlorotic Mottle
Stomatal Rows