Only one channel being loaded for some data cubes

[jeffctaylor]

Some of my data cubes are showing up as single channel images when they are loaded. One of these cubes is N15693D.fits from the CARTAImages repository.

This is happening in both the latest develop code and the latest OS X binary.

[slovelan]

I guess I am curious as to why you think N15693D.fits is not 2-dimensional. When I load my local copy of it, there is a report that it has an empty or nonexistent spectral axis. The shape is reported to be [170,182]. Are you seeing something different?

On 12/18/2015 01:18 PM, Jeff Taylor wrote:

Some of my data cubes are showing up as single channel images when they are loaded. One of these cubes is N15693D.fits from the CARTAImages repository.

This is happening in both the latest develop code and the latest OS X binary.

— Reply to this email directly or view it on GitHub https://github.com/Astroua/CARTAvis/issues/123.Web Bug from https://github.com/notifications/beacon/AGSu-7iLVIbhy9V3AQdrmJDwijMKXdQ2ks5pRGGigaJpZM4G4Z6C.gif

[jeffctaylor]

Try loading it in ds9 or another viewer. In ds9, it shows up as an 18-channel data cube. It used to load like this in CARTA as well, but sometime within the last couple of months (I added it to the CubesTest folder in the images repository in October, but I hadn't looked at it since then until this past week) it started loading as a 2D image.

Actually, now that I look more closely, the shape is being reported as [60, 60, 18] in CARTA, but there is no channel animator for it.

[slovelan]

We must be looking at a different image then. ds9 seemed to agree with CARTA. Can you send me the URL where the image is located? Susan

On 12/20/2015 11:57 AM, Jeff Taylor wrote:

Try loading it in ds9 or another viewer. In ds9, it shows up as an 18-channel data cube. It used to load like this in CARTA as well, but sometime within the last couple of months (I added it to the CubesTest folder in the images repository in October, but I hadn't looked at it since then until this past week) it started loading as a 2D image.

Actually, now that I look more closely, the shape is being reported as [60, 60, 18] in CARTA, but there is no channel animator for it.

— Reply to this email directly or view it on GitHub https://github.com/Astroua/CARTAvis/issues/123#issuecomment-166147387.Web Bug from https://github.com/notifications/beacon/AGSu--T1aazj1zccgkV7Q2VFk520Uh6mks5pRvGwgaJpZM4G4Z6C.gif

[jeffctaylor]

If you go to the CARTAImages repository, you should be able to find it in the CubesTest directory.

[slovelan]

Just found it, and now I can see the problem. Apparently there is more than one version of N15693D.fits floating around. Susan On 12/20/2015 12:07 PM, Jeff Taylor wrote:

If you go to the CARTAImages repository https://docs.google.com/a/ualberta.ca/folderview?id=0B71tg6U4W78KY3dXZ1JlYnlCSU0&usp=drive_web, you should be able to find it in the CubesTest directory.

— Reply to this email directly or view it on GitHub https://github.com/Astroua/CARTAvis/issues/123#issuecomment-166147785.Web Bug from https://github.com/notifications/beacon/AGSu-0asg_Y03aPwZoReSfA35c9g_0_9ks5pRvPVgaJpZM4G4Z6C.gif

[slovelan]

The particular image cited in this issue has a LINEAR axis rather than a SPECTRAL axis. I could not see any support for LINEAR axes in our code so I added it to Carta/Lib/AxisInfo, the CoordinateFormatter and other associated classes. This allows the cube to be displayed. The checked in code is in the susan branch.

On 12/20/2015 12:07 PM, Jeff Taylor wrote:

If you go to the CARTAImages repository https://docs.google.com/a/ualberta.ca/folderview?id=0B71tg6U4W78KY3dXZ1JlYnlCSU0&usp=drive_web, you should be able to find it in the CubesTest directory.

— Reply to this email directly or view it on GitHub https://github.com/Astroua/CARTAvis/issues/123#issuecomment-166147785.Web Bug from https://github.com/notifications/beacon/AGSu-0asg_Y03aPwZoReSfA35c9g_0_9ks5pRvPVgaJpZM4G4Z6C.gif