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• Remote sensing is the scanning of the earth by satellite or high-flying
aircraft in order to obtain information about it.
• Remote sensing is to get information about an object or phenomenon
without making physical contact with the object and thus in contrast to
on site observation.
• Remote sensing can be either active or passive.
• Passive sensors gather radiation that is emitted or reflected by the
object or surrounding areas. Reflected sunlight is the most common
source of radiation measured by passive sensors. Examples of passive
remote sensors include film photography, infrared, charge-coupled
devices, and radiometers.
• Active sensor, on the other hand, emits energy in order to scan
objects and areas then detects and measures the radiation that is
reflected or backscattered from the target. RADAR and LiDAR are
examples of active remote sensing.
• Sensors which radiate their own light or energy and do not depend
upon Electromagnetic Radiation (EMR) are called Active Sensors.
• Sensors which depend upon Electromagnetic Radiation (EMR) and do
not emit their own light are known as Passive Sensors.
Remote sensing is used in numerous fields, including geography and most
Earth Science disciplines (for example, hydrology, ecology, oceanography,
glaciology, geology); it also has military, intelligence, commercial, economic,
planning, and humanitarian applications.
Remote sensing makes it possible to collect data of dangerous or inaccessible
areas.
In older days, people used to
take information of an
area by taking help from
Pigeon via tying camera on
the pigeon’s body.
 Flood estimation
 Earthquake Estimation
 Weather Maps
 Crop Yielding
 Tsunamis
 Forest Fires
 Regional Planning
 Surveying in Inaccessible Areas
 Flood and Drought (storm) Warnings
 In past, we term Remote Sensing as Aerial photography.
 Cat and some other animals emit infrared to see even in night.
 GPS system is present in pigeon’s mind.
 Moons revolve around the planets and planets revolve around the stars.
 There are over 100 billion stars in our galaxy.
 There are over 100 billion galaxies in universe.
 Night sky is packed with stars and we see about 3000 stars at the sky.
 Sun could fit 1 million Earths inside it, means it is 1 million times bigger than earth.
 Stars burn in different colours i.e. from red to yellow and from yellow to blue.
 Sun is also star and it is tiny as compared to really big stars.
 The largest star ever discovered is 1 billion times bigger than our sun.
Mapping and remote sensing presentation
Mapping and remote sensing presentation

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Mapping and remote sensing presentation

  • 1.
  • 2. • Remote sensing is the scanning of the earth by satellite or high-flying aircraft in order to obtain information about it. • Remote sensing is to get information about an object or phenomenon without making physical contact with the object and thus in contrast to on site observation.
  • 3. • Remote sensing can be either active or passive. • Passive sensors gather radiation that is emitted or reflected by the object or surrounding areas. Reflected sunlight is the most common source of radiation measured by passive sensors. Examples of passive remote sensors include film photography, infrared, charge-coupled devices, and radiometers. • Active sensor, on the other hand, emits energy in order to scan objects and areas then detects and measures the radiation that is reflected or backscattered from the target. RADAR and LiDAR are examples of active remote sensing.
  • 4.
  • 5. • Sensors which radiate their own light or energy and do not depend upon Electromagnetic Radiation (EMR) are called Active Sensors. • Sensors which depend upon Electromagnetic Radiation (EMR) and do not emit their own light are known as Passive Sensors.
  • 6. Remote sensing is used in numerous fields, including geography and most Earth Science disciplines (for example, hydrology, ecology, oceanography, glaciology, geology); it also has military, intelligence, commercial, economic, planning, and humanitarian applications. Remote sensing makes it possible to collect data of dangerous or inaccessible areas. In older days, people used to take information of an area by taking help from Pigeon via tying camera on the pigeon’s body.
  • 7.  Flood estimation  Earthquake Estimation  Weather Maps  Crop Yielding  Tsunamis  Forest Fires  Regional Planning  Surveying in Inaccessible Areas  Flood and Drought (storm) Warnings
  • 8.  In past, we term Remote Sensing as Aerial photography.  Cat and some other animals emit infrared to see even in night.  GPS system is present in pigeon’s mind.  Moons revolve around the planets and planets revolve around the stars.  There are over 100 billion stars in our galaxy.  There are over 100 billion galaxies in universe.  Night sky is packed with stars and we see about 3000 stars at the sky.  Sun could fit 1 million Earths inside it, means it is 1 million times bigger than earth.  Stars burn in different colours i.e. from red to yellow and from yellow to blue.  Sun is also star and it is tiny as compared to really big stars.  The largest star ever discovered is 1 billion times bigger than our sun.