search

CNES / MAJA

Level-2A processor used for atmospheric correction and cloud-detection. The active repository is the one below, this one is kept to leave access to the older issues.
https://gitlab.orfeo-toolbox.org/maja/maja
Apache License 2.0
139 stars 25 forks source link

maja for landsat product #6

Closed smfcrts closed 5 years ago

smfcrts commented 5 years ago

hi, i tested maja on sentinel products, and i'm wondering if does maja work on landsat8 products.

olivierhagolle commented 5 years ago

The answer is yes, but it is complicated

MAJA needs tiles as input. To enable multi-temporal processing, we need to have all the inputs to have the same upper left corner, projection, number of lines and columns... It is not the case with standard Landsat 8 products. Only the "ARD" products above US have this feature.

So, within Theia, we do a resampling and we tile the landsat products, but I have not introduced that in start_maja (I would love to, but it would mean one or two weeks of work).

And USGS Landsat8 L2 have a good quality, i encourage you to ask for them in https://earthexplorer.usgs.gov Olivier

smfcrts commented 5 years ago

thank you for your answer Just to better understand, you means that standard landsat 8 products should be processed to have the needed features to run start_maja.

olivierhagolle commented 5 years ago

yes, all Landsat 8 data within a time series for a given site should be cut into tiles, with exactly the same upper left corner location, and the same size. And of course there is a certain format to use. Olivier

smfcrts commented 5 years ago

Thank you for your explanation.I hope you introduce that on start_maja as soon as possible.

olivierhagolle commented 5 years ago

I'll try, but certainly not before summer.