gh_mirror/jhunkeler/stwcs_hcf.git/lib/stwcs/wcsutil, branch pre-astropy

port changes from astropy.wcs - naxis1/2 are private now.

2014-04-24T19:28:34+00:00

git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stwcs/trunk@31128 fe389314-cf27-0410-b35b-8c050e845b92

Minor simplification and improvement to the final check for diverging/invalid coordinates compared to r31125. Improvements/corrections in code formatting, comments, and help.

2014-04-24T01:13:42+00:00

git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stwcs/trunk@31126 fe389314-cf27-0410-b35b-8c050e845b92

This revision improves upon changes made to the `all_sky2pix` in r31122 and r31123 that address issues described in ticket #1121 and ticket #1122, by implementing a more robust handling of the divergent solutions. The new parameter `detect_divergence` will allow to detect divergent solutions at each iteration. Now, even if `adaptive` is set to `False`, assuming `detect_divergence` is `True`, when divergent solutions are detected `all_sky2pix` will automatically switch from the highly efficient fully vectorized algorithm to a less efficient (~30%) (still vectorized) but adaptive algorithm.

2014-04-23T07:32:20+00:00

Updated comments and examples to `all_sky2pix` to reflect the changes.



git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stwcs/trunk@31125 fe389314-cf27-0410-b35b-8c050e845b92

1. reverted to 1e-4 default accuracy (compared to r31122 );

2014-04-21T19:26:54+00:00

2. improved NoConvergence error class and its documentation;
3. implemented detection of a divergent numerical method (previously this would have been impossible to distinguish why a method does not converge: was it due to too low maxiter (and or accuracy) setting or it was due to inherent divergence of the method for given deometric distortions.


git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stwcs/trunk@31123 fe389314-cf27-0410-b35b-8c050e845b92

1. Modified all_sky2pix to return either a list of 1D vectors or a 2D array depending on the format of the input data to bring all_sky2pix to behave similarly to other similar functions: wcs_pix2sky, wcs_sky2pix, all_pix2sky.

2014-04-18T01:34:29+00:00

2. Major improvements (10x for non-vetorized use and ~400x for vectorized use) in performance of the function.


git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stwcs/trunk@31122 fe389314-cf27-0410-b35b-8c050e845b92

STWCS update to insure that NEXTEND keyword (if already present in primary header) remains consistent with full size of FITS file after updates.

2013-12-30T17:01:35+00:00

git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stwcs/trunk@28702 fe389314-cf27-0410-b35b-8c050e845b92

remove unused variables

2013-12-03T20:43:39+00:00

git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stwcs/trunk@27708 fe389314-cf27-0410-b35b-8c050e845b92

Updated API for stwcs.wcsutil.hstwcs.HSTWCS.all_sky2pix() to accept both 1-D arrays for Ra,Dec and a single 2-D array to be consistent with pywcs.WCS.all_pix2sky().

2013-11-18T21:19:58+00:00

This resolves #1076.


git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stwcs/trunk@27470 fe389314-cf27-0410-b35b-8c050e845b92

Very minor/simple update to HSTWCS.all_sky2pix() method to not update output values based on an increasingly bad inversion. This only affects positions at an extreme distance outside the frame where the distortion model breaks down and becomes unstable.

2013-10-30T19:49:06+00:00

git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stwcs/trunk@27118 fe389314-cf27-0410-b35b-8c050e845b92

Fixed a bug introduced in r26987 to the headerlet module that caused headerlet.apply_as_primary to fail when the headerlet was created directly using the Headerlet class and an HDUList as input.

2013-10-24T16:09:28+00:00

git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stwcs/trunk@26990 fe389314-cf27-0410-b35b-8c050e845b92