Earthdata Forum

Hi there,
I posted the same question in 'SeaDAS 7 - General questions'. But I haven't got any responses. Maybe I posted in the wrong place. So I post it again.
A hico level 2 product was projected in Seadas V7.1. However, there are some problems at the right and left corners. An representative image is attached here. Please advise.
Thanks.
Jun

Hi Jun,

I had a look at the HICO scene you refer to and find the
geolocation information has no unexpected corner anomalies.
I am attaching a 3-band image I made from the data without
using SeaDAS.  We'll need to investigate further.

In the mean time, can you post the exact steps you used
to make your image?

Regards,
Norman

By default, the Reprojection tool uses a nearest neighbor resampling approach.  It offers two others: bilinear and bicubic.
If you select the bicubic approach, the reprojected image does not have these 'wing-like' artifacts.  I will contact our BEAM
partners (who developed the reprojection tool) to see if they can identify why these artifacts occur with the nearest neighbor
(and apparently the bilinear) option

Regards,
Sean

Hi Sean,
Thanks. You're right. If the 'bicubic' resampling method is selected, the artifact is gone.
@Norman. The step I used was
Processing -> Reproject.
The output format was set as 'GeoTIFF'. The other parameters are as default.
According to Sean's reply, everything is fine now.
Thanks again.
Jun

BTW, is it possible to do the reprojection from the command line?
Jun

Yes, using GPT (the Graph Processing Tool).   We're still working on a decent tutorial for this, however, there are several posts on this forum with examples.
There is also an overview presentation on the subject.

Regards,
Sean

Nice post... It is a great post to enhance my information about HICO. Now i came to know what is full form and what is its work....