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* Closes #674: updatewcs adds a keyword UPWCSVER to the primary header of the ↵dencheva2011-02-241-3/+1
| | | | | | flt file to record the version of STWCS used in the updates. In addition removed the __version__ string from hstwcs - we have decided to have only one version string for the entire package. git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stsci_python/trunk/stwcs@12011 fe389314-cf27-0410-b35b-8c050e845b92
* Fixed(?) circular import introduced into the HSTWCS module. hack2011-02-221-1/+3
| | | | git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stsci_python/trunk/stwcs@12005 fe389314-cf27-0410-b35b-8c050e845b92
* Made the new 'all_sky2pix()' method in HSTWCS dramatically faster, by ↵hack2011-02-221-15/+20
| | | | | | performing the fit in the linear pixel space rather than in decimal degrees on the sky. This allows the method to use a simple (limited) for loop for the iterations instead of a potentially infinite while loop, while generally requiring much fewer than 10 iterations as opposed to over 350 for the fit on the sky. The added complication, though, is that this method now relies on a linear WCS derived using the 'utils.output_wcs()' function. git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stsci_python/trunk/stwcs@12004 fe389314-cf27-0410-b35b-8c050e845b92
* The HSTWCS class of STWCS has been updated with a new method: all_sky2pix(). ↵hack2011-02-211-1/+84
| | | | | | This new method implements an iterative solution using the full distortion model to convert sky positions into pixel positions. The algorithm used was based on the code from drizzle's task 'tranback'. This method has been checked using WFC/IR image with SIP and ACS/HRC image with SIP+NPOLFILE such that the RA/Dec positions for a few random positions can be returned to within a delta close to the error limit (<<0.001 pixels). This also addresses Ticket #673. git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stsci_python/trunk/stwcs@12003 fe389314-cf27-0410-b35b-8c050e845b92
* Pulled the code which deals with input into a separate module. Changes to ↵dencheva2011-02-161-58/+29
| | | | | | the HSTWCS module are related to using it with headerlets, as well as with observations from other telescopes. git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stsci_python/trunk/stwcs@11958 fe389314-cf27-0410-b35b-8c050e845b92
* Added a method to update the scaledencheva2011-02-041-0/+7
| | | | git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stsci_python/trunk/stwcs@11869 fe389314-cf27-0410-b35b-8c050e845b92
* Added documentaiondencheva2010-09-301-57/+74
| | | | git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stsci_python/trunk/stwcs@10440 fe389314-cf27-0410-b35b-8c050e845b92
* Fixed a probelm with converting a PC to a CD matrix in alternate WCS'sdencheva2010-09-231-1/+1
| | | | git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stsci_python/trunk/stwcs@10381 fe389314-cf27-0410-b35b-8c050e845b92
* Corrected a mistake in previous checkindencheva2010-09-221-1/+1
| | | | git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stsci_python/trunk/stwcs@10373 fe389314-cf27-0410-b35b-8c050e845b92
* Refactored wcsutildencheva2010-09-221-0/+344
git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stsci_python/trunk/stwcs@10371 fe389314-cf27-0410-b35b-8c050e845b92
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