Search for notes by fellow students, in your own course and all over the country.
Browse our notes for titles which look like what you need, you can preview any of the notes via a sample of the contents. After you're happy these are the notes you're after simply pop them into your shopping cart.
Title: remote sensing
Description: introduction and general insight of remote sensing and related processes
Description: introduction and general insight of remote sensing and related processes
Document Preview
Extracts from the notes are below, to see the PDF you'll receive please use the links above
Remote Sensing
Syed Muhammad Zahid Shah
GIS Analyst / Consultant
smzahid
...
com
smzahid
...
com
What is Remote Sensing?
Definition 1:
Remote sensing is the science
(and to some extent, art) of
acquiring information about the
Earth's surface without actually
being in contact with it
...
shah@yahoo
...
shahshah@gmail
...
...
Eyes are living examples
2
...
Gravity Meter: Gravity Force distribution
smzahid
...
com /
smzahid
...
com
2
The Major Components Of Remote-sensing
Technology
1
...
PLATFORMS (Vehicle to carry the sensor) (truck, aircraft,
space shuttle, satellite, etc
...
SENSORS (Device to detect electro-magnetic radiation)
(camera, scanner, etc)
4
...
PROCESSING (Handling signal data) ( photographic, digital)
6
...
shah@yahoo
...
shahshah@gmail
...
shah@yahoo
...
shahshah@gmail
...
shah@yahoo
...
shahshah@gmail
...
e
...
e
...
SUN
Active and Passive RS
smzahid
...
com /
smzahid
...
com
6
Sensors
(Active and Passive)
Passive sensors
•Landsat
•ASTER
•Quickbird
•Ikonos
Active Sensors
•LIDAR
•RADAR
smzahid
...
com /
smzahid
...
com
7
smzahid
...
com /
smzahid
...
com
8
Process of Remote sensing /
Elements involved in Remote sensing
1
...
Radiation and the Atmosphere (B)
3
...
Recording of Energy by the Sensor
(D)
5
...
Interpretation and Analysis (F)
7
...
shah@yahoo
...
shahshah@gmail
...
01μm
U – V Rays 0
...
1 μm
Visible 0
...
7 μm (Near IR, Middle IR,
Thermal IR)
• Infra red Rays 0
...
shah@yahoo
...
shahshah@gmail
...
• The two major interactions of such kinds are:
– Absorption
– Scattering
smzahid
...
com /
smzahid
...
com
11
• Absorption is the process in which energy is
absorbed and converted into other forms of
energy
...
The
tree major constituents of the atmosphere
which are responsible for absorption are :
– Ozone (O3) : absorbs the harmful U
...
Atmospheric Window
• The part / portion of EMR which is least or
unaffected by the atmospheric absorption are
called “ Atmospheric Window”
• This include visible portion, almost all part of
Infra Red IR, Microwaves and Radio waves
...
shah@yahoo
...
shahshah@gmail
...
For instance, water reflects very little EMR, while soil and vegetation
reflect EMR under different wavelengths
...
smzahid
...
com /
smzahid
...
com
13
smzahid
...
com /
smzahid
...
com
14
RESOLUTION
• All remote sensing systems have four types of
resolution:
– Spatial
– Spectral
– Temporal
– Radiometric
smzahid
...
com /
smzahid
...
com
15
SPATIAL RESOLUTION
smzahid
...
com /
smzahid
...
com
16
SPECTRAL RESOLUTION
smzahid
...
com /
smzahid
...
com
17
smzahid
...
com /
smzahid
...
com
18
TEMPORAL RESOLUTION
July 2
July 18
August 3
16 days
Time
11 days
July 1
smzahid
...
com /
smzahid
...
com
July 12
July 23
August 3
19
RADIOMETRIC RESOLUTION
6-bit range
0
63
8-bit range
0
255
10-bit range
0
smzahid
...
com /
smzahid
...
com
1023
20
smzahid
...
com /
smzahid
...
com
21
smzahid
...
com /
smzahid
...
com
22
smzahid
...
com /
smzahid
...
com
23
smzahid
...
com /
smzahid
...
com
24
smzahid
...
com /
smzahid
...
com
25
smzahid
...
com /
smzahid
...
com
26
smzahid
...
com /
smzahid
...
com
27
AERIAL PHOTO
smzahid
...
com /
smzahid
...
com
28
GOES (Geostationary Operational
Environmental Satellites) IR 4
SPOT (2
...
shah@yahoo
...
shahshah@gmail
...
shah@yahoo
...
shahshah@gmail
...
shah@yahoo
...
shahshah@gmail
...
g
...
For change detection is very useful tool (Forest, land
cover detection, urban expansion etc)
Image data are sometimes also used as image maps,
with an overlay of political boundaries, roads, rivers
etc
...
smzahid
...
com /
smzahid
...
com
32
Use of Remote Sensing Data in GIS
Nowadays RS is emerging as powerful tool for the assessment and
management of natural hazards
...
Such kind of maps
will enable the authorities for quick assessment of potential impact of
a natural hazard and initiation of appropriate measures for reducing
the impact
...
It will also help them
during post-disaster activities for the assessment of damages and
losses occurred due to flooding
...
shah@yahoo
...
shahshah@gmail
Title: remote sensing
Description: introduction and general insight of remote sensing and related processes
Description: introduction and general insight of remote sensing and related processes