Deriving LST from Landsat Data TM/ETM

[achoknyz]

Dear All,

 

Am trying to derive the land surface temperature of an area within the tropix in a bid to detect Urban Heat Island. Am proposing a time series to detect if at all it is existing. My biggest problem lies with deriving of the emissitivity where i have used formulars that have been advanced before but cant get values within the range, Anyone with a clear tutorial on how to derive LST using Envi or Erdas will be very helpful.

 

Thank you in advance and Regards to all.

[Arhanghelul]

For the Emissivity:

I used the NDVI threshold method to derive the emissivity, developed bt Sobrino et al. (2004; 2008) and adapted to my study area (land cover/land use classes)

 

here is a detailded document about emissivity methods: https://anonfiles.com/file/aa5097c0b21fe6ebf9abb5261bc33fce

 

For the Land Surface Temperature (LST):

 

I used the Radiative Transfer Equation - RTE (Berk et al. 1989) and the Atmospheric Correction Parameter Calculator (ACPC) to facilitate calculation for the atmospheric transmission, upwelling and downwelling radiances, with uncertaiuies in the inferred surface temperatures by approximately ±2-3 Kelvin degrees (Barsi et al. 2005) http://landsat.gsfc.nasa.gov/atm_corr/

 

Then, based on the formulaes, I extracted the Emissivity and the LST using the Model Maker in ERDAS.

 

P.S: there is no method that can offer you a precise emissivity, 100%. The methods only offer an estimation for the emissivity and finally, for the LST.

 

P.S: you can also make an account on ERDAS forum and search there for more informations.

 

Good luck !

Edited August 7, 2013 by Arhanghelul

[poorbaby]

Dear All,

 

Am trying to derive the land surface temperature of an area within the tropix in a bid to detect Urban Heat Island. Am proposing a time series to detect if at all it is existing. My biggest problem lies with deriving of the emissitivity where i have used formulars that have been advanced before but cant get values within the range, Anyone with a clear tutorial on how to derive LST using Envi or Erdas will be very helpful.

 

Thank you in advance and Regards to all.

Dear achoknyz,

 

The first, if you want to detect Land surface temperature, you need to use band Thermal Infrared image (Landsat, aster)...

If you use Landsat image, you use Envi software to process. You need realize steps:

 

Step 1: Convert from digital number Values (DN) to spectral radiance values

Step 2: Calculate value spectral radiance to temperature value

[Arhanghelul]

Here, you can see a model of LST estimation using ERDAS :

 

http://giswin.geo.tsukuba.ac.jp/sis/tutorial/koko/SurfaceTemp/SurfaceTemperature.pdf

 

This is a simple model, assuming that Emissivity is uniform (=1) and no atmospheric correction is done (no corrections for atmospheric transmission, upwelling and downwelling radiances). So, if you apply this example, you can obtain a relative LST, witch is not the real-ground LST, but is very used in most literature.

 

For more details about LST algorithm, search for  http://www.sciencedirect.com/science/article/pii/S0034425712004749

Edited August 8, 2013 by Arhanghelul

[3dbu]

nice , i did using the Lansat Band6 but i just it till to kelvin degree ...in envi have the it like sad poorbaby...pls share a napshot of your results.

 

regards

[poorbaby]

nice , i did using the Lansat Band6 but i just it till to kelvin degree ...in envi have the it like sad poorbaby...pls share a napshot of your results.

 

regards

hey captain,

 

I have ever study science report for student in university about LST. You can reference my article: http://www.mediafire.com/view/h7a7sxvkkkk9u9d/LST_BCKH.ppt (But it's Language Vietnamese) .

I hope it's helpful for you.

[dragon_287]

hey captain,

 

I have ever study science report for student in university about LST. You can reference my article: http://www.mediafire.com/view/h7a7sxvkkkk9u9d/LST_BCKH.ppt (But it's Language Vietnamese) .

I hope it's helpful for you.

Many thanks, Poorbaby. 

[wajeehaniaz1]

For the Emissivity:

I used the NDVI threshold method to derive the emissivity, developed bt Sobrino et al. (2004; 2008) and adapted to my study area (land cover/land use classes)

 

here is a detailded document about emissivity methods: https://anonfiles.com/file/aa5097c0b21fe6ebf9abb5261bc33fce

 

For the Land Surface Temperature (LST):

 

I used the Radiative Transfer Equation - RTE (Berk et al. 1989) and the Atmospheric Correction Parameter Calculator (ACPC) to facilitate calculation for the atmospheric transmission, upwelling and downwelling radiances, with uncertaiuies in the inferred surface temperatures by approximately ±2-3 Kelvin degrees (Barsi et al. 2005) http://landsat.gsfc.nasa.gov/atm_corr/

 

Then, based on the formulaes, I extracted the Emissivity and the LST using the Model Maker in ERDAS.

 

P.S: there is no method that can offer you a precise emissivity, 100%. The methods only offer an estimation for the emissivity and finally, for the LST.

 

P.S: you can also make an account on ERDAS forum and search there for more informations.

 

Good luck !

will you kindly please send me any screen shots of the model???

[Arhanghelul]

Here, I have found a very useful tutorial about estimating LST from LANDSAT:

 

http://fromgistors.blogspot.ro/2014/01/estimation-of-land-surface-temperature.html

[Raghu Veer Degala]

I have a problem I want to find the land surface temperature of Bangkok using landsat8. I have everything to get it but the problem is landsat images are obtained during morning time but the maximum temperature will be afternoon period. How can I get the exact maximum temperatures of a day

[markcres]

I have written a Windows package called LSTools. You can download for free here:

http://www.ukscience.org/software.html

(Bottom of list of Windows apps)

It scans the text file accompanying Landsat data downloaded from GLOVIS and compiles the expressions to generate reflectance, radiance and temperature. You can just copy and paste into ArcGIS, QGIS or Erdas Imagine. It knows the constants and derives the correct solar zenith angle etc.

Cheers

Mark

[am2]

I have written a Windows package called LSTools. You can download for free here:

http://www.ukscience.org/software.html

(Bottom of list of Windows apps)

It scans the text file accompanying Landsat data downloaded from GLOVIS and compiles the expressions to generate reflectance, radiance and temperature. You can just copy and paste into ArcGIS, QGIS or Erdas Imagine. It knows the constants and derives the correct solar zenith angle etc.

Cheers

Mark

Dear Mark,

Can we use your application as an extention for arcmap or Envi or even stand alone app?

What do you think of this?

thanks

[markcres]

Dear Mark,

Can we use your application as an extention for arcmap or Envi or even stand alone app?

What do you think of this?

thanks

 

Hi

 

It is already a standalone app. You install it like any Windows software and it creates an icon for you.

 

Cheers

Mark

[am2]

Hi

 

It is already a standalone app. You install it like any Windows software and it creates an icon for you.

 

Cheers

Mark

Hi,

Thank you for your information...I think if we can make a complate your app and make it an stand alone aplication which do process on its own without need to use erdas or envi,it could be down using gdal and dotspatial