Kerala SCERT Class 10 Social Science 2 Chapter 6 Eyes in the sky and Data analysis Question Answer Solution Here. Kerala Board Class 10 Students can find Here 6th Chapter Eyes in the sky and Data analysis Notes provide by our Teacher. Important Question Answer from Chapter 6 Eyes in the sky and Data analysis.
- Board- Kerala Board.
- Class – 10.
- Subject – Social Science Part 2
- Chapter – 6.
- Chapter Name – Eyes in the sky and Data analysis.
- Topic – Question Answer Solution.
(1) What is platform?
Answer:
The carrier on which sensors are fixed are called platform.
(2). What is sensor and what its works?
Answer:
Devices used for data collection in remote sensing are called sensor. Cameras and scanners are sensors. The electromagnetic radiation reflected by objects recorded by the sensors.
(3). How remote sensing can be classified?
Answer:
Remote sensing classified on the basis of sources as
(1) Passive Remote Sensing: Remote sensing is carried out with the help of solar energy is known as passive remote sensing. Energy does not emitted by sensors.
(2) Active Remote Sensing: Remote sensing made with the aid of artificial source of energy radiating from the sensor is known as active remote sensing.
(4). What is Terrestrial Photography?
Answer:
The method of obtaining the earth’s topography using cameras from the ground is known as Terrestrial Photography.
(5). What is Aerial remote sensing?
Answer:
The method of obtaining photography of the Earth’s surface continuously from the sky by using cameras mounted on aircraft is known as aerial remote sensing.
(6). What is Satellite Remote sensing?
Answer:
The process of gathering information using the sensors installed in artificial satellites is known as Satellite Remote sensing.
(7). What are the merits of using Aerial remote sensing?
Answer:
The advantage of using Aerial remote sensing is that information of any region can gathered in accordance requirements. Another merit of using this method contiguous picture of the areas along the path of the craft is made available.
(8). What are the aerial photographs and What does it mean by overlap in aerial photographs?
Answer:
The photographs obtained through aerial remote sensing are called as aerial photographs. In each Aerial photograph, nearly 60% of the places depicted in the adjacent photo include. This is done for ensuring contiguously and to attain three dimensional visions with the help of stereoscope. It is known as overlap in aerial photographs.
(9). What are the terms stereoscope and stereoscopic vision?
Answer:
The instrument which is used to obtain three dimensional views from the stereo pairs is called stereoscope. When a viewed through a stereo scope we get a three dimensional view of the area depicted in the setero pair. This type of three dimensional received view is known as stereoscopic vision.
(10). What are the limitations of using Aerial Remote sensing method?
Answer:
The limitations of using this method are as (1) the shaking of air craft affect the quality of photos. (2) It is not practical to take photographs of region that are vast and extensive.(3) the aircrafts require open space for takeoff and landing. (4) Landing the air craft’s frequently for refuelling increase the cost.
(11). What is Satellite Remote sensing and what are their types?
Answer:
The process of collecting information using sensors Fixed on artificial satellites is called satellite remote sensing. The artificial satellites are mainly dividing into two types’ geostationary satellite and Sun Synchronous Satellite.
(12). Differentiate between geostationary satellite and Sun Synchronous Satellite.
Answer:
Geostationary satellite:
(1) They orbit the earth at an elevation of about 36000 kilometres above the earth.
(2) One third of the earth comes under its field of view.
(3) As the movement of the Satellite corresponds to the speed of rotation of the earth it stays constantly above a specific place on the earth.
(4) This helps in continuous data collection of an area.
Sun Synchronous Satellite:
(1) The orbit of this Satellite is about 900 km in altitude.
(2) The surveillance area is less than that of the geostationary Satellite.
(3) The repetitive collection of information of a region at regular interval is possible.
(4) Used for the collection of data on natural resources, land use ground water etc.
(13). State the example geostationary Satellite and sun Synchronous Satellite.
Answer:
India’s INSTAT is the example of geostationary Satellite. Satellite IRS, Landsat series are examples of sun Synchronous Satellite.
(14). Write the name of sensors used in the following Satellites.(1) Landsat 1,2,3,4,5 (2) SPOT (3) IRS (4) Geo Eye
Answer:
(1) Landsat – Multiple spectral Scanner
(2) SPOT – Panchromatic Camera
(3) IRS – PANLISS – III
(4) Geo Eye – Panchromatic Multi spectral Camera.
(15). What are the uses of Remote sensing technology?
Answer:
The uses of Remote sensing technology are
(1) For the assessment of weather and its observations.
(2) For ocean exploration.
(3) To understand the land use of an area.
(4) For the monitoring of flood and drought.
(5) For identify forest fires in deep forests and to adopt controlling measures.
(6) To collect data regarding the extent of crops and spread of pest attack.
(16). What is spatial data?
Answer:
Each feature on the earth surface of the earth has a location of its own. Such features of the Earth’s surface having a specific location are known as special data.
(17). What are Attributes?
Answer:
The additional information about the characteristics of each spatial data on the Earth’s surface are called attributes.
(18). What are layers?
Answer:
The thematic maps prepared and stored in geographic Information system for analytical purpose are called layers.
(19). Why overlay analysis is used?
Answer:
Overlay analysis is used to understand the mutual relationship among the various features on the Earth’s surface and the periodic changes undergone by them. Overlay analysis can help to understand the changes in the area of crops, the changes in land use etc.
(20). What is buffer Zone?
Answer:
A circular zone created around a point feature or a parallel zone created aside a linear feature in buffer analysis is called buffer zone.
(21). For what purpose Buffer analysis is used?
Answer:
If we want to find out the number of houses located within three kilometre radius of our school, the possibility of buffer analysis can be used effectively.
(22). How geographic Information system Works?
Answer:
Geographic information systems is computer based information management system by which the data collected from the source of information like maps, aerial photographs, Satellite, imageries, tables, surveys etc. are incorporated in to the computer using software, which are retrieved, analyzed and displayed in the form of maps, tables and graphs. The analyzed data can be converted in accordance with our needs in to product either in the form of maps, tables or digital data.
(23). How Sensor works?
Answer:
Sensors record the electromagnetic radiation either reflected or emitted by the object. Each object on the surface of the earth reflects electromagnetic radiation in different measure.
(24). What are the spectral signature and spatial resolution of the sensor?
Answer:
The energy reflection of plants is different from that of the water bodies. Spectral signature is the amount of reflected energy by each object. A satellite sensor can differentiate the size of the smallest object on the surface of the earth by using spatial resolution of the sensor.
(25). What deals with linear features on the map?
Answer:
The network analysis addresses the linear features on the map. This linear feature comprises roads, railway lines, rivers etc. Network analysis helps in a way to know the easiest and less congested roads.
(26). What are the usages of GIS?
Answer:
GIS used for
- Gather data from many different sources.
- It is easy to update data and comprise it.
- It is possible to study thematic wise.
- Using GIS geographical features can be represented.
- Using GIS the visual models can be generated of future and collected data is processed.
- In GIS maps, graphs and table can be prepared.
(27). Why Satellite based Navigation System used for?
Answer:
Satellite based Navigation System used for monitoring the location and movement of objects on the surface of the earth. Many sectors use this system e.g. map building, transporting etc.
(28). What is the use of GPS?
Answer:
Global Positioning System also known as GPS help to sense the latitudinal and longitudinal location. It also help in elevation of objects on the surface of the earth at the time.
(29). What arrangement has been done to use GPS?
Answer:
In the Global Positioning System, a series of 24 satellites has been set at 6 different orbits. These Satellites are between 20000 and 20200 km altitude above from the earth. Through these satellites it is possible for us to locate objects using our handheld device. These GPS needs signals from at least four satellites, with those four satellites information like latitude, longitude, elevation, time, etc are calculated. There are some more satellites added in the system to increase accuracy.
(30). What is IRNSS?
Answer:
IRNSS stands for Indian Regional Navigation Satellite System. This is the State – of – the art satellite based navigation system. Apart from the 1500 kilometres radius other countries like Pakistan, China and Indian Ocean also under surveillance of this navigation system.
(31). What is Bhuvan?
Answer:
Bhuvan is a geo-portal platform started in March 2009. It is a satellite based geo-portal platform and remote sensing image portal basically. Bhuvan is developed by the Indian Space Research Organization (ISRO) for the purpose of preparing maps of Indian terriotory by using its own satellites.
(32). What are the prime functions of Bhuvan?
Answer:
Preparing online maps by utilizing GIS and remote sensing technologies is the prime function of Bhuvan.
(33). What facilities can be availed by visiting the web portal https://bhuvan-app1.nrsc.gov.in
Answer:
Following facilities can be availed by visiting the web portal https://bhuvan-app1.nrsc.gov.in
- Bhuvan 2D: Provides 2D visualization of Indian terrain.
- Bhuvan 3D: Provides 3D visualization of the surface of the earth.
- Climate: Provides information regarding climate and environment.
- Disaster support: It provides support and facilitates to manage services during disaster.
- Ocean services: It provides services for the Ocean.
- Agriculture: It provides services regarding agriculture.
(34). Write a short note on School Bhuvan.
Answer:
ISRO with National Council of Educational Research and Training initiated the School Bhuvan portal. School Bhuvan is an e-learning portal for students which based on a map and it offers information of natural resources of the country. It also inform about environment and its role in sustainable development.
(35). What is My Map?
Answer:
My map is tool provided on Bhuvan web portal to prepare maps of any region in India by getting details of the features of the surface with the help of GIS technology.
(36). How remote sensing technology used in monsoon flood 2018?
Answer:
Satellite remote sensing applied very to face flood in 2018. This technology used to develop map of the areas affected by flood, estimated loss, and the post flood conditions of rivers and damage assessment of the areas affected by flood. Remote sensing used to collect detailed information of surface and analyzed it with the help of GIS and flood predicting models are prepared by identifying flood vulnerable areas.
(37). Write a note on the scope of GIS.
Answer:
GIS is one of the fastest growing technologies. This technology is effectively applied in various fields such as industry, education, agriculture, planning, irrigation, forestry, transportation, disaster management, disease management, market analysis, tax collection, protection, tourism, natural resource management and so on. GIS has now become one of the most useful technologies in business, communications, resource management, and specifically in planning and development. The widespread use of GIS technology offers enormous job opportunities in this field. Many world-class institutions offer a variety of geo-informatics courses and programs, including GIS technology, television, and more.