Land Surface Temperature | Calculate LST in QGIS

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  • Опубликовано: 29 окт 2024

Комментарии • 51

  • @diywithfabiha
    @diywithfabiha 3 месяца назад

    Make a tutorial on future prediction of LST map

  • @keileechamengflores6628
    @keileechamengflores6628 15 дней назад

    Esta formula solo sirve para Ladsat 8, este procedimiento puede servir para Landsat 5 o 9 ?

  • @HemanthRSGIS
    @HemanthRSGIS 5 месяцев назад +1

    Ma'am for Min NDVI values is negative but in the PV formula you taken as positive value instead of (-0.172219)

    • @dawnofgeospatialworld
      @dawnofgeospatialworld  5 месяцев назад +2

      two negative signs makes one positive sign. (if we minus any negative value then, '- ' + '-' = +)

    • @АртурГолятин
      @АртурГолятин 3 месяца назад

      ​@@dawnofgeospatialworld at 4:59 shouldnt it be like:
      ( ( NDVI - ( - 0.172219 ) / ( 0.619821 - ( -0.172219 ) ) )
      thus
      ( ( NDVI + 0.172219 ) / ( 0.619821 + 0.172219 ) )
      Doublechecking myself by this example:
      ruclips.net/video/weYG1c1pRS8/видео.html

    • @dawnofgeospatialworld
      @dawnofgeospatialworld  3 месяца назад

      @@АртурГолятин when two minus signs come then it becomes plus sign

  • @نذيرصلاحالدينأيوب
    @نذيرصلاحالدينأيوب 4 месяца назад

    Please, does the procedure of LST retrieval require preprocessing for the thermal band?

  • @ferrellananda
    @ferrellananda 2 месяца назад

    Do we need to do atmospheric correction with SCP plugin before doing this calculations or no?

    • @dawnofgeospatialworld
      @dawnofgeospatialworld  2 месяца назад

      Yes, Atmospheric correction is needed

    • @ferrellananda
      @ferrellananda 2 месяца назад

      @@dawnofgeospatialworld but i see you use images without the “RT” in front of the filename (which indicates that no atmospheric correction is done). Does the landsat file in this video go through atmospheric corrections? If yes, can you show me how? Thank you

    • @dawnofgeospatialworld
      @dawnofgeospatialworld  2 месяца назад

      @@ferrellananda Follow the step 1 (Top of Atmosphere)

    • @dawnofgeospatialworld
      @dawnofgeospatialworld  2 месяца назад

      @@ferrellananda You can check this video also, ruclips.net/video/UmxjBwGK56g/видео.htmlsi=Z72NKBSgNgfeQjar

  • @DorothyKB
    @DorothyKB 4 месяца назад

    Hi! thank you, very helpful :) do you have a scholarly source for the method you've used in this video that you could link here?

    • @dawnofgeospatialworld
      @dawnofgeospatialworld  4 месяца назад

      This is a general method. You can search articles in google scholar.

  • @ThwmasSt
    @ThwmasSt 2 месяца назад

    we to use this method? if we donwload and extract thermal data from ERA 5 or Nasa is it the same?

  • @FutureBureaucrats100
    @FutureBureaucrats100 11 месяцев назад

  • @ajaydowney
    @ajaydowney 9 месяцев назад

    more useful thank you

  • @КонстантинДерейко
    @КонстантинДерейко 10 месяцев назад

    Thank you so much!

  • @jezekielrestar7935
    @jezekielrestar7935 7 месяцев назад

    Hello, my value of radiance_add_band for landsat 7 is -0.06709, should i still use the negative sign or ignore it?

  • @piratad.8bits788
    @piratad.8bits788 4 месяца назад

    Is this methodology based on research? If so, can you tell me the name of the article?

  • @methylsalicylate7531
    @methylsalicylate7531 10 месяцев назад

    at 6:17 if I use landsat9 do I still have to use 10.8 for wavelength?

  • @homenborah9077
    @homenborah9077 3 месяца назад

    Ma'am is it same for landsat 4,5 data

  • @thoduosapriina4750
    @thoduosapriina4750 Месяц назад

    how can we calculate LST using SCP?

  • @jayitamukherjee5533
    @jayitamukherjee5533 7 месяцев назад

    What would be the LST formula for Landsat 5 TM sensor?

    • @dawnofgeospatialworld
      @dawnofgeospatialworld  7 месяцев назад

      The process will be same. Just check the band numbers for Landsat 5. like Thermal band of L5 is B6.
      In the LST calculation formula, put 11.45 for w value (10.8*BT/14388)

  • @rayjaybalderama3443
    @rayjaybalderama3443 11 месяцев назад

    can it be used for water temperature?

    • @dawnofgeospatialworld
      @dawnofgeospatialworld  11 месяцев назад

      Yes you can use it, but it doesn't give the accurate temperature for all time because of the temp. difference between Land & Water.

    • @rayjaybalderama3443
      @rayjaybalderama3443 11 месяцев назад

      do I still need to calculate the ndvi for water temperature? If not, what should I calculate?

    • @dawnofgeospatialworld
      @dawnofgeospatialworld  11 месяцев назад

      @@rayjaybalderama3443 You can Check Chlorophyll Index instead of NDVI. But I don't think This method will that much effective for Water Temperature.

    • @dawnofgeospatialworld
      @dawnofgeospatialworld  11 месяцев назад

      @@rayjaybalderama3443 As you can see in this video, if you need inland water surface temperature, you can use LST method. There are some small waterbodies in that location & surface temperature was calculated.
      But if you want to calculate sea surface temperature, there will be different method to calculate that.

  • @amritanshchaubey231
    @amritanshchaubey231 5 месяцев назад

    Hello mam, I'm doing same steps as you but my LST value is very high(53 to 81).
    I'm using landsat 8...

    • @dawnofgeospatialworld
      @dawnofgeospatialworld  5 месяцев назад

      Mask/clip with your study area

    • @thenameisabii
      @thenameisabii 4 месяца назад

      mine is coming 66to 81

    • @thenameisabii
      @thenameisabii 4 месяца назад

      using landsat 10

    • @dawnofgeospatialworld
      @dawnofgeospatialworld  4 месяца назад

      @@thenameisabii Landsat 10?

    • @АртурГолятин
      @АртурГолятин 3 месяца назад

      I had the same problem, i fixed it by checking my initial data from landsat8.
      For this tutorial you have to use Lvl 1 data instead of Lvl 2. (In my case i used [ L1TP ] instead of [ L2SP ] from Landsat8)

  • @EMINOUELABGHARY
    @EMINOUELABGHARY 7 месяцев назад

    please in LST I found a great value, I don't know what the problem is (min=309 and max=346)

    • @dawnofgeospatialworld
      @dawnofgeospatialworld  7 месяцев назад

      Do you convert the BT value from Kelvin to Celsius?

    • @EMINOUELABGHARY
      @EMINOUELABGHARY 7 месяцев назад

      @@dawnofgeospatialworld YES the problem is solved thank you

    • @ankananath9312
      @ankananath9312 5 месяцев назад

      @@EMINOUELABGHARY PLEASE HELP ME... My value is big too.. how to resolve it?