Hi Martin, Thanks for the detailed feedback ! You are right, it is clear Polymer is wrong in how it reads the lats/lons. As you say, the coordinates of the centre of the north east pixel should not be the same at different resolutions. Looking at the code (method init_latlon in level1_msi.py), it is...

I doubt your command has succeeded, because the command should be "make", in the directory containing the makefile, not "make ./polymer4.13/".

The makefile is used by the command "make".

Dear Ding,
You need to compile the program first, using the command "make".
More information can be found in the file README.md.
Cheers,
François

Hi,
I can not provide help about IDLE, but if you provide me with more information about your issue with polymer_cli.py, I would be happy to help.
Cheers,
François

Dear Binbin,

For more information about how to run the code, you can have a look at section 2.1 of README.md, and also in example.py at the root of the polymer distribution.
Cheers,
François

Thanks for the details, Fernanda. So the NaNs that are source of the issue do not come from the NetCDF file, but from the variable chl_conc_c2flag. Here are my advices : - The simplest solution seems indeed to use different masking expressions for different variables. Does it take significantly more...

Hi Fernanda, Thanks for the details. If you are looking for a workaround, it is possible to tweak how the "no-data" is written (the fill_value, in netCDF terms), however I don't really know how you should do it. You can have a look at polymer/level2_nc.py, line 98 and after. Maybe removing the optio...

Hi Fernanda,
You would probably have better luck asking in the ESA step forum - it seems that the main issue is why it works in the GUI but not using gpt-snap, but I'm afraid I can not help you on this issue.
Cheers,
François

Dear Sonia, It seems indeed that there is a mismatch between the georeferencing you have defined in your geotiff file, and the "good" coastline, which I understand comes from your GIS software. But did you actually use anything related to georeferencing from the polymer output ? The variables lat an...