The specified region, if not null, must intersect with the image's bounds.

Hello everyone

I have a problem that has already been addressed here, but I believe that these were special cases.

I want to say in advance that I apologize for the text, because I am from Russia and I can only interact with English through a translator.

The case is as follows: I performed the tutorial " TRAINING KIT CRYO02 (GLACIER VELOCITY WITH SENTINEL-1 USING SNAP S-1 TOOLBOX-PETERMAN GLACIER, GREENLAND)".

At one of the stages, namely Terrain correction, after set the product as the Source Product and In the Processing Parameters tab set:
Digital Elevation Model: ACE30 (Auto Download)
Map Projection: Custom CRS (EPSG: 32621 – WGS84 / UTM Zone 21N) and startup, I got this error.

Unfortunately, I am a very novice specialist. I started working with the program and this tutorial for the first time today. I can’t figure out how to fix the error and whether it’s possible.

I will attach this tutorial as a link. If anyone has time to help me, I would be very grateful.

TUTORIAL LINK: https://rus-copernicus.eu/portal/wp-content/uploads/library/education/training/CRYO02_GlacierVelocity_Greenland_Tutorial.pdf

maybe your data lies in another UTM zone

please try UTM / WGS84 (Automatic)

grafik

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Unfortunately, the problem was not resolved. I tried to select a different zone, but the error still exists.

Can I ask how important this stage is for further glacier velocity calculation and data visualization? Can I skip it, or will I not be able to go any further?

you can extract the velocity but will not be able to combine it with other geospatial data unless it is terrain corrected.

But UTM is not ultimately necessary. Try WGS84 in latitud and longitude
grafik

Please also un-check “Mask out areas without elevations”

Where is your glacier located?

No, the error came up again(
Is the projection exactly the problem?

the error message indicates that the coordinates are somehow not understood correctly by SNAP.

Where is your glacier located?

Screenshot_1
This is a glacier in Greenland, suggested by this tutorial. The data I downloaded differs only in the year, since the tutorial was in 2017, and data from 2017 is not available on Copernicus.

I see, so no SRTM is available. Please try another AutoDownload DEM, for example GETASSE or ACE2.

If none of them work, please try the SAR Simulation Terrain correction. If this fails as well, please try the Ellipsoid correction.

If none of them work, maybe the velocity data has some errors which need to be checked.

With ACE2 I got a new error.

8 posts were split to a new topic: Terrain correction with gpt