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Why Satellite maps in INDIA are BLUR compared to other countries||सैटेलाइट मैप BLUR क्यों हैं - YouTube
Channel: PowerTrain
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most of you have seen satellite maps
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and you may have observed that india's satellite imagery
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is blurred comapared to other nations
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you see UAE, USA , Europe or any other country
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one can see the same level of clarity in the images
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so why is it like this, lets find out
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if you unable to understand what is mean by blur
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then this will clear your doubts
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this is a fully zoomed location in our country
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see the details in roads, cars and other stuff
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and similarly we cans see different locations for a better idea of clarity
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now lets see a different location
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compare the details in cars, roads and buildings over here
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these are some more example images
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there are 2 main reasons due to which satellite images are not clear in india
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out which the first one is more important i.e the Law in india
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in india, for normal use, private companies are allowed only
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a certain limit for resolution
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and it's 1 metre spatial or 1 metre GSD (Ground spatial distance)
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which means that the image shown by a satellite
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will have it's smallest pixel
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sizes 1x1 metre in ground or surface of the earth
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and this the max they can do, some places have even more restrictions
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Now what is Resolution ?
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any image is made up of tiny squares
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and many such squares form an image
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more the number of squares, more clear is the image
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Just like you can select 720p or 1080p on youtube for video quality
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thats the resolution
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i.e the numbers there denote number of sqaures in the video vercally
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in normal images theses squares are too small
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you cant even see them with your naked eye
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but satellite imagery being on such a huge scale
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their pixel size can be from a few centimetres to metres
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many years back when satellite maps became widespread in india
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even average person could access satellite maps
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the government decided, due to security reasons
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the entire general population and companies especially
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would'nt be the right entities to allow high res maps
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and 1 metre GSD order was set for all private companies
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i.e even if there is a satellite that can get high res images
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& obviously many private companies and government itself have those satellites
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that can capture better images than 1 m GSD
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are virutually blurred instead of showing high res images
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now this is done because
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whatever military establishments we have
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road networks we have
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and other sensitive areas can be protected
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initially most governments had these concerns that
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High res maps can be used for wrong purposes like
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spying, emergencies etc
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and this was'nt an concern only for india but almost all countries worldwide
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and similar rules were setup worldwide
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but by time, as tech became advanced
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and satellite maps became more useful than just maps
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and were used in other applications
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the industry demanded government to increase resolution
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and countries that started with 2-3 metre GSD rules
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kept updating their rules every 2,3 or max 4 years
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security later known not to be a big concern as earlier said
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higher resolution was permitted
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However the last time india updated it's resolution was 11 years back
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and has'nt been updated since
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ride haling, logostics , surveying companies
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have to face difficulties because of low resolution
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and they have been demanding to increase resolution atleast of 0.5m GSD
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If the rules are passed
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we will see more clear maps in coming years in india
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but because of bureaucracy, this might be far still
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and let's see how long it takes.
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The second factor is related to plane imaging
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whatever important cities exist in the word
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google or google's data providers
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use air planes to image them, instead of satellites
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airplanes with imaging equipment are flown over cities for imaging
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and thus cities allowing such permissions, have high resoultions
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because of these planes, not jus satellites
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but due to certain rules again
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it's not allowed to use planes in most cases
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and many permissions are needed if an exception
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this why google or it's companies just dont use planes in india
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and use satellites exclusively
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and this is why you see a difference in clarity
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between india and most other nations
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I hope you liked the video.
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