Transcript Document

Tuesday, 5 January 2010
ESS 421 – Introduction to Geological Remote Sensing
Prof: Alan Gillespie (JHN 343) [email protected]
Office hours: T, W, Th 1-3 or by arrangement
TA: Iryna Danilina (JHN 330) [email protected]
Office hours: Mon-Wed-Fri 2-3 or by arrangement
Lectures: Tuesday/Thursday 9:30-10:20 JHN-111
Labs: Tuesday/Thursday 10:30-12:20 JHN-366
Midterm: Tuesday, 9 February 9:30-10:20 JHN-111
Final: Wednesday, 17 March 10:30-12:20 JHN-111
Class website:
http://gis.ess.washington.edu/keck/ess421_documents.html
Class structure
Model 2
(ESS 421)
Model 1
Lectures
Lectures
Reading
Labs
Reading
Labs
Lab Exercises
° one lab per week, handed out Tuesdays
° due the following Tuesday (or as noted in outline) in class
° lab files (e.g., “Lab_1.doc”) are available from the website
° print only the “Answers” file of the lab (e.g., “Lab_1-answers.doc”) &
turn in only this sheet to TA with your answers
late work will be docked 10% per day
° at the beginning of the lab on Tuesdays there will be a short one-page
graded quiz on the lab just turned in, plus reading for the past week.
Bring a sheet of paper for the answers and turn in to the TA.
° the labs just handed in will be reviewed after the quiz
Reading Assignments
°Text
is Lillesand, Kiefer, and Chipman “Remote Sensing and
Image Interpretation” 6th ed. 2007, John Wiley
° Reading assignments in the text are augmented with other
material available on class website
Examinations & Grading
°Midterm and Final will both contain questions from the
lectures, reading, and labs
° Midterm covers 1st half of class
°Final covers whole class with emphasis on 2nd half
Labs - 30%
Lab quizzes - 20%
Midterm - 20%
Final - 30%
Failure to turn in all work in each of the 4 categories above will result in an incomplete
Tuesday, 5 January 2010
Lecture 1: Introduction
Reading assignment: Lillesand, Kiefer & Chipman:
Ch 1.1, 1.2, 1.6, 1.7, 1.10, 1.11
Ch 2.9 – Multiband imaging
App. A – Concepts & terminology
App. B – Data and resources
(p. 727-731)
(p. 732-735)
1
What is remote sensing?
Measurement from a distance -
Hazardous locales -
“Denied terrain”
Nodong, N. Korea
2
X (longitude)
Y (latitude)
What is an image?
3
Images in combination with maps
add to interpretive power
Geographic Information System (GIS)
4
Images can be made at different wavelengths of light
l=11.405 mm
l=10.755 mm
l=10.275 mm
l=9.205 mm
l=8.735 mm
l
l=0.870 mm
l=0.804 mm
l=0.658 mm
l=0.542 mm
l=0.462 mm
Y
Image visualizations display
only a subset of the data
X
NASA MASTER airborne 50-band multispectral image
5
and displayed as color pictures
l=11.405 mm
l=10.755 mm
l=10.275 mm
l=9.205 mm
l=8.735 mm
l
l=0.870 mm
l=0.804 mm
l=0.658 mm
l=0.542 mm
l=0.462 mm
Y
R=0.658mm
G=0.542mm
B=0.462mm
X
NASA MASTER airborne 50-band multispectral image
6
Only 3 bands at a time can be visualized this way…
Spectrum
but there is more information,
and can be shown in a spectrum
l=11.405 mm
l=10.755 mm
l=10.275 mm
l=9.205 mm
l=8.735 mm
l
l=0.870 mm
l=0.804 mm
l=0.658 mm
l=0.542 mm
l=0.462 mm
Y
R=0.658mm
G=0.542mm
B=0.462mm
X
7
Spectra are different and convey
information about composition
Note the scale change!
R=0.658mm
G=0.542mm
B=0.462mm
8
Images can be made at
different wavelengths of light
l=11.405 mm
l=10.755 mm
l=10.275 mm
l=9.205 mm
l=8.735 mm
l
l=0.870 mm
l=0.804 mm
l=0.658
l=0.462
mm mm
l=0.542 mm
Y
X
9
They reveal different information
about scene composition
THERMAL INFRARED
VISIBLE
10
Images are not limited to light reflected or emitted from a surface.
They can be made over time, or of derived or calculated parameters.
Increasing concentration of CO
Carbon monoxide at 500 mB, from NASA’s Terra/Moppitt
12
How do remote sensing and GIS fit together in geospatial analysis?
Remote sensing
Engineering
Operations
& acquisition
Calibration
GIS
Image
processing
physics of
remote sensing
Analysis &
Interpretation
project goals
Scanners
& data
Validation
scene
Knowledge
13
LKC App A: radiometric terminology (p. 742)
Radiant energy (J) [Q]
Radiant flux (J s-1 = W) [Ф]
Radiant intensity (W sr-1) [I]
Irradiance (W m-2) [E]
Spectral irradiance (W m-2 µm-1) [El]
Radiance (W m-2 sr-1) [L]
Spectral radiance (W m-2 sr-1 µm-1) [Ll]
The electromagnetic spectrum
Short l
High energy
High frequency
Long l
Low energy
Low frequency
Thermally
emitted
radiation
Reflected sunlight
In the spectrum, energy is dispersed by a grating or prism according to
frequency or wavelength
Gamma rays
X rays
Ultraviolet
<10-4 µm
10-4 - 10-2 µm
0.01-0.45 µm
Visible blue B
Visible green G
Visible red R
0.47-0.48 µm
0.51-0.56 µm
0.63-0.68 µm
Near infrared
NIR
Shortwave infrared SWIR
0.67-1.4 µm
1.4-2.5 µm
Mid-wave infrared MIR
Longwave thermal infrared LWIR
3.5-5.5 µm
8-14 µm
Microwave (Radar)
Radio
0.1mm-1 m
1 m - 10 km
What topics are covered in ESS 421?
- physical basis of remote sensing
- spectra
- radiative transfer
- image processing
- radar/lidar
-thermal infrared
- applications
14