LST, Urban Heat Island Effect, and UTFVI Analysis using Google Earth Engine and Landsat dataset

[@mazharagri7869]

MashaAllah good work .

[@REAPER7777]

Thank you for this tutorial. Please keep them coming

[@afaghzeydani7965]

great👍, i did this on ENVI couple of years ago, but in GEE loading raster data is not a pain

[@bindaslife1837]

Thanks for your tutorial Brother ❣️ For calculating Lst, which image should need to pick: TOA or surface reflectance?

[@giulianabeltramone8383]

Thank you very much for this video, and all the additional data you have provided!! I have a question that has been hunting me lately and maybe you could help me out. Isnt the ST_B10 band in the LANDSAT/LC08/C02/T1_L2 collection already a LST product?

[@lucasraiol7401]

Yes. Then you must follow these steps: ST Kelvin = (ST band × Scale) + Offset ST Celsius = ST Kelvin − 273... The Scale and Offset values to transform the pixel value from DN to Kelvin are 0.00341802 and 149, respectively.

[@lucasraiol7401]

Congrats for the video. Do you know If The Landsat 8 Collection 2 Tier 1 TOA Reflectance works with this script, but without the scaling factors? or Is it necessary include other parameter settings?

[@MuddasirShah]

Great tutorial brother. Loved it. Miles to go… 🎉

[@Zizi-mt9bv]

thank you very much sir

[@esubalewnebebe1344]

Very educative video, thank you so much.

[@coopernik]

28:19 The standard deviation of the lst seems very low no?

[@womanin30]

Thankyou so much for this tutorial, it's helpme so much

[@Bllackstaarr]

Hi, do you recommend any publications or sources explaining why NDVI is added to the analysis of surface temperature? Thank you

[@mwaleedgeo]

Hi, we add NDVI as it accounts for the vegetation fraction for that area, though you can exclude it. For details check following sources: 1) doi.org/10.1111/j.1745-5871.2010.00686.x 2) www.mdpi.com/2071-1050/15/2/1416 3) link.springer.com/chapter/10.1007/978-981-99-3675-5_4 4) doi.org/10.3390/rs12091471

[@Bllackstaarr]

@@mwaleedgeo Hi, thank you so much for taking the time to answer me! I have read the linked sources. Your publications and blog have been a great help for me and the project I'm working on :)

[@TreysSELEMANI]

Great ! Tahnks you for tutorial

[@ikomangputraastika4632]

Thank you for this tutorial and script

[@lifehacker4331]

super bhaiya

[@TarannumKhandoker]

Hi, Great Video. Thank you for this one. I have a query. What does UHI -4 to +4 mean? Is it temperature difference from mean to actual? How did you select the range? What does a UHI value of 2 at a pixel tell me?

[@mwaleedgeo]

Hi, thank you for the feedback. +-4 is the range in this case (might be different for different areas). Yes through standard deviation, we evaluate the variation in between urban and nearby non urban regions characterized by high temperature difference. UHI itself has no scale and is not necessarily dependent on the temperature, but we can say that 2 UHI means the pixel temperature is 2 degree C higher then average temperature (please cross check this from literature).

[@TarannumKhandoker]

@@mwaleedgeo Thank you for your reply.

[@angelografie9893]

I have a question, since ST_B10 band is already surface temperature (in Kelvin) for the Landsat 8 Product (specifically, "LANDSAT/LC08/C02/T1_L2") is computing for fractional vegetation and emissivity considered redundant? Why would we still need to (re)compute land surface temperature with FV and EM?

[@adeniyiadeyemi6413]

Hi great work , can you also derive Urban Heat Island Effect, and UTFVI from MODIS11A1 LST???

[@butthussain5881]

Ist of all Thank you so much for this beautiful explaination, but i have a query regarding cloud and cloud shadow bit mask is it 5,3 or 3,4 as in properties plz help me out and correct me here?

[@abhinavupadhyay3669]

also for some areas LST is not generating for selected months, showing "ComputedObject (Error) Image.select: Pattern 'ST_B6' did not match any bands." message. since temporal resolution of landsat is 16 days, so why are these images not available?

[@manjesht494]

which algthirm you used do analisis

[@DiscoverShubham]

Do we need to mask out the waterbodies, as the LST of water bodies is very less and thus UHI is coming weird..

[@scholarshipinformationandg290]

Can you please explain, in this expression, var lst = thermal.expression( '(tb / (1 + (0.00115 * (tb/0.48359547432)) * log(em))) - 273.15', {'tb':thermal.select('thermal'), 'em': em}).rename('LST')., how can you calculate 0.00115 . and is it same for Landsat 5?

[@talesofmountains5749]

Can someone please answer, if we need to perform corrections when we already use Landsat - 8 Collection 2, level 2 Data? ,

[@rebeccachandiru5865]

Do you have the same video with landsat5

[@karishtabasidawu]

Hi , i am using this code in my study area for Durban , KZN, South Africa , however for certain regions of my study area there is no lst thus uhi . Please can someone help me understand why.

[@primamuliateguh]

how to get the timestamp/ date information for the image that we use?

[@raniaamandafauzi7999]

Please, land cover/supervised classification tutorial

[@mazharagri7869]

Keep up the good work

[@lanlanhia]

Hello, I was very inspired after watching your video. Can you share the code?😃

[@Didistar96]

Thank you!! amazing video!

[@daeng_geospasial]

Great thanx

[@md.mahadihasanseyam1235]

Really amazing ❤

[@abhinavupadhyay3669]

what parameters do we have to change if we want to use landsat 5 series? I changed the band numbers for red and NIR as SR_B3 and SR_B4 respectively..and thermal band as ST_B6. are there any other modifications we have to do? and Thank you for this amazing video, this is just what I needed!

[@dilarabusradurmus5011]

also check for cloud bit mask parameters

[@abhinavupadhyay3669]

@@dilarabusradurmus5011 I think they are same for landsat 5 and 8. please correct me if I'm wrong

[@lucasraiol7401]

I'd like to know abou it as well

[@smurfk7678]

Hi! How to compute night light?

[@mwaleedgeo]

Check this dataset developers.google.com/earth-engine/datasets/catalog/NOAA_DMSP-OLS_NIGHTTIME_LIGHTS

[@-ALeAnhKhoa]

how can i export the images to qgis plse help me

[@guyliyongo9860]

il faut laisser aussi un modèle de script dans les commentaires pour que nous puissions l'utiliser

[@jpjx9493]

Hello, when I use the code you provided, the calculated image will have some patches that are empty (it shows masked in inspector), what is the reason for this?Thank you

[@abhinavupadhyay3669]

I think pixels having cloud cover are getting masked.

[@jpjx9493]

@@abhinavupadhyay3669 Thank you

[@mariamjutt8958]

Ap say contact kaisy ho skta hai?

[@karishtabasidawu]

The exact same thing is happening to me , and it is not the mask , because the ndvi is fine and so is the true image . It is just the thermal bands. Did you figure out what the issue is and please help me if you did . [e-mail]

[@geologistdinesh]

best thanks

[@MarcosArangoTamayo]

Man you make a calculation 1.438^-2, it is wrong(?), correcting: is 1.438*10^-2 = 1.438/100

[@nasreensultana1363]

He used log insead of ln ! I m bit confused