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!

@OpenSourceRemoteSensingGIS

3 жыл бұрын

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!

Thanks a lot!

@OpenSourceRemoteSensingGIS

3 жыл бұрын

You're welcome!

how i can calculate turbidity from? is that possible?

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?

@OpenSourceRemoteSensingGIS

2 жыл бұрын

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.

@rbsuhs

2 жыл бұрын

@@OpenSourceRemoteSensingGIS great! thank you very much!

Thank you so much ! Is there any way I can perform a batch of images at once.

@OpenSourceRemoteSensingGIS

2 жыл бұрын

Hi, I made a video on that... check it out here: kzread.info/dash/bejne/a2Zhq8WJl5qrqZs.html If you’re running windows, look in the description box for that option. Do subscribe if you haven’t already. Best wishes.

@simbarashempala710

2 жыл бұрын

@@OpenSourceRemoteSensingGIS Thank you again and yes I have subscribed, looking forward to more tutorials.

Excuse me, I would like to know that why the BOT reflectance value was less than the TOA reflectance value?

@OpenSourceRemoteSensingGIS

3 жыл бұрын

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.

Are other corrections needed for sentinel 2 a msi level 2a such as atmospheric correction or positional correction?

@OpenSourceRemoteSensingGIS

2 жыл бұрын

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!

@benimdunyam5377

2 жыл бұрын

@@OpenSourceRemoteSensingGIS thank you very much for your reply

@benimdunyam5377

2 жыл бұрын

@@OpenSourceRemoteSensingGIS thank you very much for your reply

Hi. Is it possible to perform the process on a merged image

@OpenSourceRemoteSensingGIS

3 жыл бұрын

Hi Oreo. No, because the process requires individual image metadata files to execute.