Thanks for this video, it's super helpful. I have one clarification. For the PV calculation, I think the denominator is NDVImax - NDVImin instead of NDVImax + NDVImin. You used subtraction not addition when you did 1 - (-1) -> 1 + 1 = 2. Otherwise the denominator would be 0.
first of all you presented it very well sir. can you please explain the value of a and b in the emissivity formula like why those specific values you took? is there any specific method to determine the values of a and b based on different area and scene. in addition can you also explain the final LST formula specially the BT/1 and BT/14380 part! like again if there is a specific value of denominator based on different scene.
sir, while calculating pv where the formula is ((NDVI-NDVImin)/(NDVImax+NDVImin)).....where you have used the values as (NDVI image+1)/(1+1)....in the second part y it is (1+1)? as we have the negative value as minimum NDVI as - - is understable that it will become + but when it -+ so how it became +?
My NDVImin nad NDVI max are not 1 and -1, it is somewhere (-0.3 and +0.56) in that case, for PV calculation.. should i enter these numbers as max min or 1 and -1 only?
Bahi 64 degree temp. is impossible.Till now the highest temp. record in the world is only 56.7 degree.. I think your estimation is wrong. If not then plz do clear me.
@@vikasghadamode my concern was that is it ok to use both the bands or only single band will give us the desired results? Anyways your video is helpful though 👍
sir, I have a problem when I am trying it in Landsat 5 image, the lower and upper temp.is calculated (-67 deg C) and 142 deg c. after clipping the AOI the temp. is measured 113.27 and 118.437 deg c approximately. Will the constant value change? If so, please tell me the constant values used in the case of Emissivity and LST, at the time of calculation.
When using LANDSAT 4/5/7 use the single channel algorithm whilst LANDSAT 8/9 use the split method as there are two thermal bands(10 and 11).Different methods are used to calculate the LST.
bt in india will der be 64 degree temperature? mine is also showing like that so.. mine its showing 67 degrre high nd 37 degree low for bangalore urban? is it possible?
Sir, if you kindly tell me the conversion process of the Radiance Multiplicative value of band 10 (3.3420E - 04 = 0.0003342), I'll be grateful. Thank you in advance.
Omg thanks I was dying for like 2 days with this thing!!!!!
Thanks for this video, it's super helpful. I have one clarification. For the PV calculation, I think the denominator is NDVImax - NDVImin instead of NDVImax + NDVImin. You used subtraction not addition when you did 1 - (-1) -> 1 + 1 = 2. Otherwise the denominator would be 0.
Yes, you are right. However, it was a nice presentation.
@@mam2014 totally agree! Congrats Vikas
You are a Legend...Thank you so much!!!
This is really helpful. Thank you for making such a valuable video.
Thank you so much sir ❤❤❤
Wrong prosess, but right answer.
Thank you for sharing this your insightful tutorial, but please which algorithm is it ?
first of all you presented it very well sir. can you please explain the value of a and b in the emissivity formula like why those specific values you took? is there any specific method to determine the values of a and b based on different area and scene. in addition can you also explain the final LST formula specially the BT/1 and BT/14380 part! like again if there is a specific value of denominator based on different scene.
thank you for such a detailed informative video!!
sir, while calculating pv where the formula is ((NDVI-NDVImin)/(NDVImax+NDVImin)).....where you have used the values as (NDVI image+1)/(1+1)....in the second part y it is (1+1)? as we have the negative value as minimum NDVI as - - is understable that it will become + but when it -+ so how it became +?
Thanq sir
My NDVImin nad NDVI max are not 1 and -1, it is somewhere (-0.3 and +0.56) in that case, for PV calculation.. should i enter these numbers as max min or 1 and -1 only?
Same issue
THANK YOU SO MUCH
from where to download ARCGIS map software .. can u please provide me link to download the software
Should we clip the study area in the beginning?
If you wish to clip in beginning you can clip no problem
Very good.....
This is really helpful. Can you caculator TDVI (temperature
vegetation dryness index) ?
You made mistake in basic math. that's why LST became 64 degree celcius. Human brain would come out through nose in 64 degree..
Is this calculation required for level 2 products?
Sir the value of W that is 10.8
Is it given in meta data ?
Which algorithm it is ? mono window algorithm ? single channel algorithm ? or split window algorithm ?
pls which algorithm is it ?
Sir, do we need to make separate maps to see LST change in time interval?
thank you
Is it necessary to do radiometric or atmospheric correction before the LST calculation? Please tell me sir
Yes it is required
@@vikasghadamode please sir upload a video on LST with radiometric correction..
while calculating PV, as NDVI min value is in negative this becomes +1 in numerator but not -1 is denominator. reason!!
Bahi 64 degree temp. is impossible.Till now the highest temp. record in the world is only 56.7 degree..
I think your estimation is wrong. If not then plz do clear me.
Why can't we use both the bands i.e 10&11 for calculating LST from Landsat 8 data ??
You can use band 11 also same process you can try on band 11 also
@@vikasghadamode my concern was that is it ok to use both the bands or only single band will give us the desired results?
Anyways your video is helpful though 👍
@@vandanatomar1688 if you try from both band then it will better result
@@vandanatomar1688 have u tried it form both bands? how was the result?
Hlo sir how to conversion value of reflection
My NDVI is not showing -1 to 1 range, it is showing some other integers.. is it okay to carry forward?
I think you didn't use float in formula
sir, I have a problem when I am trying it in Landsat 5 image, the lower and upper temp.is calculated (-67 deg C) and 142 deg c. after clipping the AOI the temp. is measured 113.27 and 118.437 deg c approximately. Will the constant value change? If so, please tell me the constant values used in the case of Emissivity and LST, at the time of calculation.
When using LANDSAT 4/5/7 use the single channel algorithm whilst LANDSAT 8/9 use the split method as there are two thermal bands(10 and 11).Different methods are used to calculate the LST.
You have to use low reflectance value to calculate lst of landsat 5 band (low 0. High 150 aproximatly ). Then your lst is fine
bt in india will der be 64 degree temperature? mine is also showing like that so.. mine its showing 67 degrre high nd 37 degree low for bangalore urban? is it possible?
I have the same problem...
Hi sir iam getting ndvi from -0.26 to 0.56 its ok
Sir, if you kindly tell me the conversion process of the Radiance Multiplicative value of band 10 (3.3420E - 04 = 0.0003342), I'll be grateful.
Thank you in advance.
Hlo sir pls tell me this process w
How convert the value
Pls tell me the conversion process
How can I get arc gis software?
sir landsat-9 (W) value????
What if the al is in negative
Vikas Sir, My Study area temprature is 5.26 to 53.382
So is it Right? Plz reply me Soon
I don't know in which area you are working
@@vikasghadamode
In mumbai region
could you please show me the reference for these formulas??
It's there in description box
Sir video is awesome. Sir I would like to know how to do mapping of water turbidity?
For that you need to prepare NDTI map
once I input the formula it's showing error 000539.
This error could occur if the output filename is too long or if the "Spatial Analyst" extension is not enabled.
It is showing temperature more than 60+ that is impossible in real world, how can we correct it
yeah beacause i think ndvi is caLCULATED WRONGS
@@athlete265 even mine shoiwing 69 degree fr bangalore location.. what wrong we did in NDVi can u please explain me...
@@shashidharan6492 ndvi must be calcaulated by refalnatce value not by radiance values
Or check formula of everysteps
@@athlete265 ya did it again again the temperature is raising and also it's showing negative temperature
Why I got ERROR 000539 while calculating LST?
Do it again. N don't change the output folder let it be the default one... Restart app n try...
Helo, can I get a journal?
Check discription box
THE IS NEGATIVE SIGN IN BOTH SIDE OF THE FORMULA