Lab 3
Comparison of Image
Types
Geog 418/518, Fundamentals of
Remote Sensing
Name 1 Name 2
As
you answer the questions below, provide a brief summary of:
1)
what information is gained
or lost as you use different perspectives:
2)
What information is gained
or lost as you use different spatial scales;
3)
what information is gained
or lost as you use different spectra to view the landscape; and
4) what applications each image might be used for.
1. What information is gained or lost as you use different
spatial scales?
a)
Finer resolution (large scale) imagery:
b)
Coarser resolution (small scale) imagery:
2.
What information is gained
or lost as you use:
a)
Oblique views?
b)
vertical perspectives?
3. Bring up the 1 m resolution black and white,
true color, and 6 band images in three different views. Visually compare what features appear
similar or dissimilar based purely on shades of gray or color. Then use the spectral profile tool to compare
the spectra of two or more features
(e.g., a tree tops, gravel, wood, water) on Lamar_1m_TM5 image (the
profiler tool will not work on the other two images, which do not have spectral
attribute data files associated with them). In the spaces below, discuss what
advantages/disadvantages might occur (e.g., what information is gained or lost) as you use
different spectra to view the landscape
a)
Black&White
b) True
color:
c) False
color infrared (using the Lamar_TM5_1m image, assign band 4 to red, band 3 to
green, and band 2 to blue):
a)
3 and 25 cm, ground-based oblique
photos:
b)
Airborne black and white, 1
m image.
c)
True color images, 1 and 8 m
resolution.
d)
6 band image, false color
composite, 1 m resolution.
e)
Oblique satellite imagery at
0.5 km resolution.