Description Working of Remote sensing and GIS .pptx

DESCRIPTION AND WORKING OF Remote Sensing and GIS

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 surface without actually being in contact with it. This is done by sensing and recording reflected or emitted energy and processing, analyzing and 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. 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." 

10. 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)

11. APPLICATION OF REMOTE SENSING Application of Remote Sensing in resource exploration. Environmental application of Remote Sensing Application of Remote Sensing for land use and land covering. Application of Remote Sensing in local natural hazards.

12. ADVANTAGES Provides a view for the large region. Current space survey enables taking pictures. I ts ability to cover large areas, high temporal frequency, and lower cost compared to ground-based investigation and monitoring .

13. DISADVANTAGES Too costly to build and operate. Data interpretation is dificult . Need sound knowledge and understanding of how the instrument is making the measurements.

14. GIS

15. 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 .

16. KEY COMPONENTS OF GIS Computer hardware and Software Spatial data from the ‘Real World ‘. Trained Personal

17. APPLICATION OF GIS Land information

18. Environmental field

19. ADVANTAGES Power to create maps with image shown. Visualize spatial data information Provide solutions for problems Number of job opportunities

20. DISADVANTAGES Very Expensive Geographical error increases with larger scale Violetion of privacy Failures of initiating aditional efforts in order to fully implement the GIS

21. 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.

22. Reference Advanced Surveying - V.K.Kumavat Remote Sensing and GIS - Basudev Bhatta www.google.com www.wikipedia.com

23. Thank You