We can also reach the folder in Windows following 2 easy steps 1) Go to the folder using files explorer 2) Type "cmd" (without quotes) on the address bar
Thank you very much for this tutorial. I have a question: Is it possible to perform the process for multiple images at the same time? I have to process around 60 images and it would be perfect to be able to do it all at once. Thank you!
Hi Daniel, Yes it should be possible, and even though I’m yet to try it out, this is how you can approach it: The command line interpreter has a ‘FOR’ construct that will allow you to loop over multiple files. So after navigating to the folder containing the ‘L2A_Process.bat’... you can do this ... for example... FOR %i IN (C:\images_folder\*.SAFE) DO L2A_Process.bat %i This should automatically repeat the process for all images ( with file extension .SAFE). Give it a try and let me know how it goes. Cheers!
Hi Kanokporn, TOA reflectance is recorded above the earth’s atmosphere (at sensor) so the reflectance values include additional contributions from clouds, atmospheric aerosols and gases, whereas BOA reflectance spectra is not affected by atmospheric components.
Hi, I made a video on that... check it out here: th-cam.com/video/92-IcPg7Ey8/w-d-xo.html If you’re running windows, look in the description box for that option. Do subscribe if you haven’t already. Best wishes.
Thank you very much. One question: after this procedure, would it be ok to compare the ndvi of one image from 2016 with the ndvi of another image from 2022?
Hi Raphael...Yes... in fact a key consideration for any time series comparison of reflectance is to ensure that all images are processed to the same level of quality. This helps to avoid any biases in comparisons.
Hi Benim, Sorry for the slow response. Do support by subscribing if you haven't already. To your question...Sentinel 2A is a surface reflectance product and comes already orthorectified. So no further atmospheric or positional correction is needed. However, if you are working in mountainous areas, then you may have to do topographic correction. cheers!
We can also reach the folder in Windows following 2 easy steps
1) Go to the folder using files explorer
2) Type "cmd" (without quotes) on the address bar
Thank you very much for this tutorial. I have a question: Is it possible to perform the process for multiple images at the same time? I have to process around 60 images and it would be perfect to be able to do it all at once.
Thank you!
Hi Daniel,
Yes it should be possible, and even though I’m yet to try it out, this is how you can approach it:
The command line interpreter has a ‘FOR’ construct that will allow you to loop over multiple files. So after navigating to the folder containing the ‘L2A_Process.bat’... you can do this ... for example...
FOR %i IN (C:\images_folder\*.SAFE) DO L2A_Process.bat %i
This should automatically repeat the process for all images ( with file extension .SAFE).
Give it a try and let me know how it goes.
Cheers!
Excuse me, I would like to know that why the BOT reflectance value was less than the TOA reflectance value?
Hi Kanokporn,
TOA reflectance is recorded above the earth’s atmosphere (at sensor) so the reflectance values include additional contributions from clouds, atmospheric aerosols and gases, whereas BOA reflectance spectra is not affected by atmospheric components.
Thank you so much !
Is there any way I can perform a batch of images at once.
Hi,
I made a video on that... check it out here: th-cam.com/video/92-IcPg7Ey8/w-d-xo.html
If you’re running windows, look in the description box for that option.
Do subscribe if you haven’t already.
Best wishes.
@@OpenSourceRemoteSensingGIS Thank you again and yes I have subscribed, looking forward to more tutorials.
Thank you very much. One question: after this procedure, would it be ok to compare the ndvi of one image from 2016 with the ndvi of another image from 2022?
Hi Raphael...Yes... in fact a key consideration for any time series comparison of reflectance is to ensure that all images are processed to the same level of quality. This helps to avoid any biases in comparisons.
@@OpenSourceRemoteSensingGIS great! thank you very much!
Hi. Is it possible to perform the process on a merged image
Hi Oreo.
No, because the process requires individual image metadata files to execute.
Are other corrections needed for sentinel 2 a msi level 2a such as atmospheric correction or positional correction?
Hi Benim,
Sorry for the slow response. Do support by subscribing if you haven't already.
To your question...Sentinel 2A is a surface reflectance product and comes already orthorectified. So no further atmospheric or positional correction is needed. However, if you are working in mountainous areas, then you may have to do topographic correction.
cheers!
@@OpenSourceRemoteSensingGIS thank you very much for your reply
@@OpenSourceRemoteSensingGIS thank you very much for your reply
how i can calculate turbidity from? is that possible?
Thanks a lot!
You're welcome!