Could not enable spatial matching: no valid transform was found

[keflavich]

I'm getting the error:

when the images have valid WCSes, and CARTA has recognized the WCS (it shows the correct coordinates in the top left).

The debugger console shows the message, "Cannot perform spatial transform between images with non-square pixels". I think this is the underlying cause of the problem - that should be shown in the error message.

Is there any way to partially support such frames? I haven't thought through the problem in depth, so the answer may just be 'no', but it would be nice if there was a way to at least approximately match such frames.

[veggiesaurus]

Do they have the same pixel ratio?

[keflavich]

unfortunately, no. they have approximately identical pixel sizes in both dimensions, but not at the third decimal place. they only differ from square by a tiny amount

[Danselem]

I'm getting the error:

when the images have valid WCSes, and CARTA has recognized the WCS (it shows the correct coordinates in the top left).

The debugger console shows the message, "Cannot perform spatial transform between images with non-square pixels". I think this is the underlying cause of the problem - that should be shown in the error message.

Is there any way to partially support such frames? I haven't thought through the problem in depth, so the answer may just be 'no', but it would be nice if there was a way to at least approximately match such frames.

I also encountered the same problem with DSS images queried from https://irsa.ipac.caltech.edu/data/DSS/

[gica3618]

I recently had the same issue with a DSS image and a CARTA developer told me that CARTA currently indeed has a limitation on spatial matching: pixels have to be square pixel.