Hips2Fits and aladin-lite communication test -- projections issues

[ManonMarchand]

What the test is

• use Hips2Fits near Orion with 30°fov
• save the fits file
• load in aladin-lite
• see if there are misalignements by eye

Note that this might miss tiny misalignment. We're near the galactic plane, so we might also miss errors near the poles.

Results

Projection	Supported by WCSlib (hence Hips2Fits)	test result
SIN	v	v
TAN	v	v
STG	v	v
ZEA	v	v
FEYE	❌
AIR	v	❌
ARC	v	v
NCP	❌
MER	v	v
CAR	v	v
CEA	v	v
CYP	v	v
AIT	v	v
MOL	v	v
PAR	v	❌
SFL	v	v
COD	v but	??
HPX	v	not supported by aladin-lite

but Note : conic equidistant COD should be in Hips2Fits (it's in WCSlib) but cannot be found

So the output of the test is that strange things happen for Airy and Parabolic projections.
Don't know where the problem lies though. Is it in aladin-lite reading or in hips2fits writing ?

[tboch]

Note: HPX projection is supposed to be supported by Aladin Lite.

[ManonMarchand]

do you have a fits file in hpx projection? Mine cannot load

[tboch]

do you have a fits file in hpx projection? Mine cannot load

Oh, OK, I see the source of confusion.
HPX FITS files are not supported at the time, but Aladin Lite can project HiPS in HPX projection.

[bmatthieu3]

I updated wcs-rs lib to support HPX projection in WCS so it works in aladin lite now