On 10/31/2012 08:56 PM, Patrick Durrell wrote:
Hi;A question on how Veusz (1.16 Mac version) handles reading the FITS header. I have a 2D image with WCS information in the header, and it works fine in (say) DS9, but when I try to read it in using Veusz, it cannot make sense of the WCS info (with CRPIX1/2, CRVAL1/2, and the related rotation matrix), and reads in pixels. Is there any way to change the imported pixel numbers (not the values per pixel) within VEUSZ so that I can manually convert them to RA and DEC? Normally I have had no trouble with the WCS when importing a 2D FITS image -- just this one image...
Hi - Veusz's WCS handling is too simplistic at the moment, unfortunately. It just treats the CRPIX/VAL linearly when converting to coordinates. It should use a wcs library to do it properly.
You could try opening the file in ds9, aligning it so north is to the top (Zoom->Align), and resaving it with File->Save image option. This might make the WCS Veusz compatible.
Jeremy _______________________________________________ Veusz-discuss mailing list [email protected] https://mail.gna.org/listinfo/veusz-discuss
