Search found 20 matches

by john6444
Tue Jan 20, 2026 11:10 am America/New_York
Forum: Home
Question: Question: SWOT pixel cloud data product misclassify cropland as water
Replies: 11

Re: Question: SWOT pixel cloud data product misclassify cropland as water

Hello, any idea about this issue?
by john6444
Thu Jan 15, 2026 10:40 am America/New_York
Forum: Home
Question: Question: SWOT pixel cloud data product misclassify cropland as water
Replies: 11

Re: Question: SWOT pixel cloud data product misclassify cropland as water

Thanks for your explanation. I just utilized python matplotlib package for plotting, the same with yours. I think the underlying reason that you cannot find matching pattern with mine is incorrect recognization of geographic coordinate unit for visualization in the bottom figure. Please note that th...
by john6444
Wed Jan 14, 2026 12:21 pm America/New_York
Forum: Home
Question: Question: SWOT pixel cloud data product misclassify cropland as water
Replies: 11

Re: Question: SWOT pixel cloud data product misclassify cropland as water

Thanks for your help and detailed description. Take a deep look into your all illustrations, I find that your last attchment plot (the bottom one) is filtered by "water_frac_uncert" < 0.1, not "water_frac_uncert" < 1.0 (mentioned words in your figure is right but your description...
by john6444
Tue Jan 13, 2026 10:31 am America/New_York
Forum: Home
Question: Question: SWOT pixel cloud data product misclassify cropland as water
Replies: 11

Re: Question: SWOT pixel cloud data product misclassify cropland as water

Hello, what do you think about this misclassification issue? In my opinion, it may be a research direction related with river channel geometry estimation (i.e., classification, top width) derived from SWOT Pixel Cloud Data Product.
by john6444
Thu Jan 08, 2026 9:51 pm America/New_York
Forum: Home
Question: Question: SWOT pixel cloud data product misclassify cropland as water
Replies: 11

Re: Question: SWOT pixel cloud data product misclassify cropland as water

Thanks for your detailed description. The specific spatial extent is at the end of Daqing River, whose specific longitude range is from 116.875035 to 116.931715 and latitude range is between 39.046942 and 39.065448. This chosen region is not large because it is only used as a demonstration of miscla...
by john6444
Tue Jan 06, 2026 4:02 am America/New_York
Forum: Home
Question: Question: SWOT pixel cloud data product misclassify cropland as water
Replies: 11

Re: Question: SWOT pixel cloud data product misclassify cropland as water

Thanks for your response. SWOT pixel cloud data utilized here is "SWOT_L2_HR_PIXC_019_200_086L_20240806T215721_20240806T215732_PGD0_01.nc". As for "water_frac_uncert", I did not apply it for open water classification because I find "water_frac_uncert" value between open...
by john6444
Sun Jan 04, 2026 10:43 pm America/New_York
Forum: Home
Question: Question: SWOT pixel cloud data product misclassify cropland as water
Replies: 11

Question: SWOT pixel cloud data product misclassify cropland as water

Hi, all, Recently I find that SWOT Pixel Cloud Data Product (SWOT_L2_HR_PIXC_D) misclassifies cropland (may be characterized with high soil moisture) as water area, which leads to incorrectly wider river channel width estimation if cropland is contiguous with river channel in this situation (see att...
by john6444
Wed Nov 19, 2025 3:51 am America/New_York
Forum: Home
Question: Question about GEDI Level2A dataset update
Replies: 2

Re: Question about GEDI Level2A dataset update

Got it. Thanks for your response!

Cheers,
Jw
by john6444
Sun Oct 05, 2025 8:53 am America/New_York
Forum: Home
Question: Question about GEDI Level2A dataset update
Replies: 2

Question about GEDI Level2A dataset update

Dear Sir or Madam, To the best of my knowledge, current most updated GEDI L2A (Elevation and Height Metrics V002) dataset is officially described in Earthdata website (https://www.earthdata.nasa.gov/data/catalog/lpcloud-gedi02-a-002). I have one question to ask: (1) I notice that there is a note in ...
by john6444
Fri Sep 19, 2025 9:42 pm America/New_York
Forum: Home
Question: Question about geophysical corrections in GEDI Level2A dataset
Replies: 4

Re: Question about geophysical corrections in GEDI Level2A dataset

Hi Brett,

Thanks for your help!

Cheers,
Jw