Search found 150 matches

by avmehta
Sat Oct 24, 2020 9:33 am America/New_York
Forum: All Questions/Comments
Question: Flags and Reprojected files
Replies: 12

Flags and Reprojected files

Thanks Sean. That is exactly what I was asking.
I appreciate your help and patience  with my questions.
Amita
by avmehta
Fri Oct 23, 2020 5:04 pm America/New_York
Forum: All Questions/Comments
Question: Flags and Reprojected files
Replies: 12

Flags and Reprojected files

HI Sean,
   If I remove the conditions (i.e. have no maskExpression) I get an error.
   So which ever flag is excluded during reprojection - pixels with those flags will be excluded correct?
Thanks.
Amita
by avmehta
Fri Oct 23, 2020 2:26 pm America/New_York
Forum: All Questions/Comments
Question: Flags and Reprojected files
Replies: 12

Flags and Reprojected files

Hello,    When I reproject OLCI L2 files I find that in some cases original L2 files look fine but reprojected files are  NaN over water at most locations! I use geographic reprojection  and bilinear resampling. I got the par file  and xml file from gpt Cookbook website:pixe...
by avmehta
Wed Oct 21, 2020 10:06 am America/New_York
Forum: All Questions/Comments
Question: Reprojecting L1 image
Replies: 1

Reprojecting L1 image

Hello,     I have been processing L1 to L2 for MODIS (250 m), OLCI, OLI, and MSI. I first extract the region of interest from L1 image then use l2gen to get L2 images. FInally I reproject the L2 images using gpt.   I was wondering if I can reproject L1 images first and the u...
by avmehta
Tue Oct 20, 2020 2:46 pm America/New_York
Forum: All Questions/Comments
Question: Flags and Reprojected files
Replies: 12

Flags and Reprojected files

Thanks you Sean.
Amita
by avmehta
Tue Oct 20, 2020 2:31 pm America/New_York
Forum: All Questions/Comments
Question: Flags and Reprojected files
Replies: 12

Flags and Reprojected files

Hello,   In my l2gen caluclations for L1 to L2 conversion of OLCI image I am setting cloudmask=0 as we want to decide our own threshold for clouds. But in my l2flag array I still see pixels are flagged with CLDICE! Is there anything else I have to specify or turnoff in l2gen inout paramete...
by avmehta
Mon Oct 19, 2020 10:43 pm America/New_York
Forum: All Questions/Comments
Question: Flags and Reprojected files
Replies: 12

Flags and Reprojected files

Yes, I thought that reprojection of flags would no make sense - but thanks you so much confirming,  Danny.
Amita
by avmehta
Mon Oct 19, 2020 10:37 pm America/New_York
Forum: All Questions/Comments
Question: MODIS 250m Processing
Replies: 20

MODIS 250m Processing

Oh Ok - Thanks for the clarification.
Amita
by avmehta
Mon Oct 19, 2020 10:23 am America/New_York
Forum: All Questions/Comments
Question: MODIS 250m Processing
Replies: 20

MODIS 250m Processing

Hello Sean,   Your suggestion about extracting domain from L1A file and then doing L1B and L2 works great!  Thank you for your help.    In the getting L2 data I am using resolution=250m, however, when I checked the output -- I am checking Rhos for all optical and NIR bands -...
by avmehta
Mon Oct 19, 2020 9:49 am America/New_York
Forum: All Questions/Comments
Question: Flags and Reprojected files
Replies: 12

Flags and Reprojected files

Thanks for the reply. I understand that reprojection would 'mix' pixels and can affect l2flags. But in reprojected files also l2flag array looks fine. It is the flag_percentages that are not correct in reprojected files. This is what I find in OLCI L2 files.  When I checked the same in ...