Description Working of Remote sensing and GIS .pptx
1. REMOTE SENSING AND GIS
By FIRDOUSIA BEGAM
STUDENT OF MEMARI GOVERNMENT POLYTECHNIC
2. CONTENT
•REMOTE SENSING
•BASIC CONCEPTS
•PRINCIPLE
•STAGES IN REMOTE SENSING
•APPLICATION OF REMOTE SENSING
•ADVANTAGES AND DISADVANTAGERS
•GEOGRAPHIC INFORMATION SYSTEMS (GIS)
•KEY COMPONENTS
•APPLICATION OF GIS
•ADVANTAGES AND DISADVANTAGES
3. REMOTE SENSING
Remote Sensing means collecting data from remote location without
coming in contact with the object.
Remote sensing is a method of collecting and interpreting
information about terrain and other objects from distance without
being in physical contact without objects.
Remote sensing involves the use of electromagnetic energy for the
characteristics determination of the objects. In remote sensing, the
imagery is obtained with a sensor.
4. Remote means away from or at a distance, sensing means detecting a property
or characteristics. Thus the term Remote Sensing refers examination,
measurement and analysis of an object without being in contact with it.
Remote Sensing is the science and art of acquiring information about the earth
information about the earth surface without actually being in contact with it. This
in contact with it. This is done by sensing and recording reflected or emitted
reflected or emitted energy and processing, analyzing and applying that
applying that information.
5. There are many possible definitions about what Remote
Sensing actually is. One of the most acceptable definitions
of Remote Sensing is “Remote Sensing is broadly defined
as collecting and interpretation information about a target
without being in physical contact with the object”. Air
crafts and satellites are the common platforms for remote
sensing observation.
6. Basic Concept
The system in which sun and earth’s material are used as a natural
source so as to radiate electromagnetic energy of variable wavelength
is called as passive system
Passive system
7. Active system
The system in which irradiance from artificially generated energy
sources
such as radar is used then it is called as active system.
8. ELECTROMAGNETIC ENERGY
Electromagnetic energy is a form of energy which moves with the
velocity of light. The sun and various artificial sources radiate
electromagnetic energy of variable wavelengths.
9.
10. PRINCIPLE
the sensing of the Earth's surface from space by making use of
the properties of electromagnetic waves emitted, reflected or
diffracted by the sensed objects, for the purpose of improving
natural resources management, land use and the protection of
the environment."
11.
12. STAGES IN REMOTE SENSING
SYSTEM
The remote sensing system consists of six stages:
i. Energy Source or Illumination (A)
ii. Radiation and the Atmosphere (B)
iii. Interaction with the Target (C)
iv. Recording of Energy by the Sensor (D)
v. Transmission, Reception, and Processing (E)
vi. Interpretation and Analysis (F)
vii. Application (G)
13.
14. APPLICATION OF REMOTE SENSING
1. Application of Remote Sensing in resource exploration.
2. Environmental application of Remote Sensing
3. Application of Remote Sensing for land use and land covering.
4. Application of Remote Sensing in local natural hazards.
15. ADVANTAGES
• Provides a view for the large region.
• Current space survey enables taking pictures.
• Its ability to cover large areas, high temporal frequency, and lower
cost compared to ground-based investigation and monitoring.
16. DISADVANTAGES
• Too costly to build and operate.
• Data interpretation is dificult.
• Need sound knowledge and understanding of how the instrument is
• making the measurements.
18. GEOGRAPHICAL INFORMATION SYSTEM (GIS)
• GIS, or geographic information systems, are computer-based tools used to
store, visualize, analyze, and interpret geographic data.It uses data that is
attached to a unique location.Most of the information we have about our
world contains a location reference: Where are USGS streamgages
located? Where was a rock sample collected? Exactly where are all of a
city's fire hydrants?
• If, for example, a rare plant is observed in three different places, GIS
analysis might show that the plants are all on north-facing slopes that are
above an elevation of 1,000 feet and that get more than ten inches of rain
per year. GIS maps can then display all locations in the area that have
similar conditions, so researchers know where to look for more of the rare
plants.
• By knowing the geographic location of farms using a specific fertilizer, GIS
analysis of farm locations, stream locations, elevations, and rainfall will
show which streams are likely to carry that fertilizer downstream.
19.
20. KEY COMPONENTS OF GIS
1. Computer hardware and Software
2. Spatial data from the ‘Real World ‘.
3. Trained Personal
23. ADVANTAGES
• Power to create maps with image shown.
• Visualize spatial data information
• Provide solutions for problems
• Number of job opportunities
24. DISADVANTAGES
• Very Expensive
• Geographical error increases with larger scale
• Violetion of privacy
• Failures of initiating aditional efforts in order to fully implement the
GIS
25.
26. CONCLUSIONS
Remote Sensing and GIS are integral to each other. The development
of Remote Sensing is of no use without the development of GIS and vice
versa. Remote Sensing has the capability of providing large amount of
data of the whole world and also very frequently. GIS has the capability of
analyzing a large amount of data within no time. Likewise capability of GIS
would have no use without the development
of Remote Sensing technology , which provides voluminus data.
