CHANGES.rst

0.22.0 (unreleased)

• Replace usages of copy_arrays with memmap [#503]
• Fix an issue with units in wcs_from_points. [#507]
• Fix incorrect units being returned in the low level WCS API. [#512]
• Synchronize region.py with the copies of it in JWST and Romancal. [#517]
• Add support for compound bounding boxes and ignored bounding box entries. [#519]
• Add gwcs.examples module, based on the examples located in the testing conftest.py. [#521]
• Force bounding_box to always be returned as a F ordered box. [#522]

0.21.0 (2024-03-10)

• Improve documentation. [#483]
• Add a minimum version requirement for asdf-wcs-schemas. [#491]
• Fix WCS.__str__ for instances without transforms. [#489]

0.20.0 (2023-11-29)

• Replace pkg_resources with importlib.metadata. [#478]
• Serialize and deserialize pixel_shape with asdf. [#480]

0.19.0 (2023-09-15)

Bug Fixes

• Synchronize array_shape and pixel_shape attributes of WCS objects. [#439]
• Fix failures and warnings with numpy 2.0. [#472]

other

• Remove deprecated old bounding_box. The new implementation is released with astropy v 5.3. [#458]
• Refactor CoordinateFrame.axis_physical_types. [#459]
• StokesFrame uses now astropy.coordinates.StokesCoord. [#452]
• Dropped support for Python 3.8. [#451]
• Fixed a call to astropy.coordinates in wcstools.wcs_from_points. [#448]
• Code and docstrings clean up. [#460]
• Register all available asdf extension manifests from asdf-wcs-schemas except 1.0.0 (which contains duplicate tag versions). [#469]
• Register empty extension for 1.0.0 to avoid warning about a missing extension when opening old files. [#475]

0.18.3 (2022-12-23)

Bug Fixes

• Fixed a bug in the estimate of pixel scale in the iterative inverse code. [#423]
• Fixed constant term in the polynomial used for SIP fitting. Improved stability and accuracy of the SIP fitting code. [#427]

0.18.2 (2022-09-07)

Bug Fixes

• Corrected the reported requested forward SIP accuracy and reported fit residuals by to_fits_sip() and to_fits(). [#413, #419]
• Fixed a bug due to which the check for divergence in _fit_2D_poly() and hence in to_fits() and to_fits_sip() was ignored. [#414]

New Features

0.18.1 (2022-03-15)

Bug Fixes

• Remove references to the six package. [#402]

0.18.0 (2021-12-22)

Bug Fixes

• Updated code in region.py with latest improvements and bug fixes from stsci.skypac.regions.py [#382]
• Added support to _compute_lon_pole() for computation of lonpole for all projections from astropy.modeling.projections. This also extends support for different projections in wcs_from_fiducial(). [#389]

New Features

• Enabled CompoundBoundingBox support for wcs. [#375]
• Moved schemas to standalone package asdf-wcs-schemas. Reworked the serialization code to use ASDF converters. [#388]

0.17.1 (2021-11-27)

Bug Fixes

• Fixed a bug with StokesProfile and array types. [#384]

0.17.0 (2021-11-17)

Bug Fixes

• world_axis_object_components and world_axis_object_classes now ensure unique keys in CompositeFrame and CoordinateFrame. [#356]
• Fix issue where RuntimeWarning is raised when there are NaNs in coordinates in angle wrapping code [#367]
• Fix deprecation warning when wcs is initialized with a pipeline [#368]
• Use CD formalism in WCS.to_fits_sip(). [#380]

New Features

• wcs_from_points now includes fitting for the inverse transform. [#349]
• Generalized WCS.to_fits_sip to be able to create a 2D celestial FITS WCS from celestial subspace of the WCS. Also, now WCS.to_fits_sip` supports arbitrary order of output axes. [#357]

API Changes

• Modified interface to wcs_from_points function to better match analogous function in astropy. [#349]
• Model._BoundingBox was renamed to Model.ModelBoundingBox. [#376, #377]

0.16.1 (2020-12-20)

Bug Fixes

• Fix a regression with pixel_to_world for output frames with one axis. [#342]

0.16.0 (2020-12-18)

New Features

• Added an option to to_fits_sip() to be able to specify the reference point (crpix) of the FITS WCS. [#337]
• Added support for providing custom range of degrees in to_fits_sip. [#339]

Bug Fixes

• bounding_box now works with tuple of Quantities. [#331]
• Fix a formula for estimating crpix in to_fits_sip() so that crpix is near the center of the bounding box. [#337]
• Allow sub-pixel sampling of the WCS model when computing SIP approximation in to_fits_sip(). [#338]
• Fixed a bug in to_fits_sip due to which inv_degree was ignored. [#339]

0.15.0 (2020-11-13)

New Features

• Added insert_frame method to modify the pipeline of a WCS object. [#299]
• Added to_fits_tab method to generate FITS header and binary table extension following FITS WCS -TAB convension. [#295]
• Added in_image function for testing whether a point in world coordinates maps back to the domain of definition of the forward transformation. [#322]
• Implemented iterative inverse for some imaging WCS. [#324]

0.14.0 (2020-08-19)

New Features

• Updated versions of schemas for gwcs objects based on latest versions of transform schemas in asdf-standard. [#307]
• Added a wcs.Step class to allow serialization to ASDF to use references. [#317]
• wcs.pipeline now is a list of Step instances instead of a (frame, transform) tuple. Use WCS.pipeline.transform and WCS.pipeline.frame to access them. [#319]

Bug Fixes

• Fix a bug in polygon fill for zero-width bounding boxes. [#293]
• Add an optional parameter input_frame to ``wcstools.wcs_from_fiducial`. [#312]

0.13.0 (2020-03-26)

New Features

• Added two new transforms - SphericalToCartesian and CartesianToSpherical. [#275, #284, #285]
• Added to_fits_sip method to generate FITS header with SIP keywords [#286]
• Added get_ctype_from_ucd function. [#288]

Bug Fixes

• Fixed an off by one issue in utils.make_fitswcs_transform. [#290]

0.12.0 (2019-12-24)

New Features

• gwcs.WCS now supports the world_axis_object_components and world_axis_object_classes methods of the low level WCS API as specified by APE 14.
• Removed astropy-helpers from package. [#249]
• Added a method fix_inputs which rturns an unique WCS from a compound WCS by fixing inputs. [#254]
• Added two new transforms - ToDirectionCosines and FromDirectionCosines. [#256]
• Added new transforms WavelengthFromGratingEquation, AnglesFromGratingEquation3D. [#259]
• gwcs.WCS now supports the new world_axis_names and pixel_axis_names properties on LowLevelWCS objects. [#260]
• Update the StokesFrame to work for arrays of coordinates and integrate with APE 14. [#258]
• Added Snell3D, SellmeierGlass and SellmeierZemax transforms. [#270]

API Changes

• Changed the initialization of TemporalFrame to be consistent with other

  coordinate frames. [#242]

Bug Fixes

• Ensure that world_to_pixel_values and pixel_to_world_values always accept and return floats, even if the underlying transform uses units. [#248]

0.11.0 (2019/07/26)

New Features

• Add a schema and tag for the Stokes frame. [#164]
• Added WCS.pixel_shape property. [#233]

Bug Fixes

• Update util.isnumerical(...) to recognize big-endian types as numeric. [#225]
• Fixed issue in unified WCS API (APE14) for transforms that use Quantity. [#222]
• Fixed WCS API issues when output_frame is 1D, e.g. Spectral only. [#232]

0.10.0 (12/20/2018)

New Features

• Initializing a WCS object with a pipeline list now keeps the complete CoordinateFrame objects in the WCS.pipeline. The effect is that a WCS object can now be initialized with a pipeline from a different WCS object. [#174]
• Implement support for astropy APE 14 (https://doi.org/10.5281/zenodo.1188875). [#146]
• Added a wcs_from_[points function which creates a WCS object two matching sets of points (x,y) and (ra, dec). [#42]

0.9.0 (2018-05-23)

New Features

• Added a TemporalFrame to represent relative or absolute time axes. [#125]
• Removed deprecated grid_from_domain function and WCS.domain property. [#119]
• Support for Python 2.x, 3.0, 3.1, 3.2, 3.3 and 3.4 was removed. [#119]
• Add a coordinate_to_quantity method to CoordinateFrame which handles converting rich coordinate input to numerical values. It is an inverse of the coordinates method. [#133]
• Add a StokesFrame which converts from 'I', 'Q', 'U', 'V' to 0-3. [#133]
• Support serializing the base CoordinateFrame class to asdf, by making a specific tag and schema for Frame2D. [#150]
• Generalized the footrpint calculation to all output axes. [#167]

API Changes

• The argument output="numerical_plus" was replaced by a bool argument with_units. [#156]
• Added a new flag axis_type to the footprint method. It controls what type of footprint to calculate. [#167]

Bug Fixes

• Fixed a bug in bounding_box definition when the WCS has only one axis. [#117]
• Fixed a bug in grid_from_bounding_box which caused the grid to be larger than the image in cases when the bounding box is on the edges of an image. [#121]

0.8.0 (2017-11-02)

• LabelMapperRange now returns LabelMapperRange._no_label when the key is not within any range. [#71]
• LabelMapperDict now returns LabelMapperDict._no_label when the key does not match. [#72]
• Replace domain with bounding_box. [#74]
• Added a LabelMapper model where mapper is an instance of ~astropy.modeling.Model. [#78]
• Evaluating a WCS with bounding box was moved to astropy.modeling. [#86]
• RegionsSelector now handles the case when a label does not have a corresponding transform and returns RegionsSelector.undefined_transform_value. [#86]
• GWCS now deals with axes types which are neither celestial nor spectral as "unknown" and creates a transform equivalent to the FITS linear transform. [#92]

0.7 (2016-12-23)

New Features

• Added wcs_from_fiducial function to wcstools. [#34]
• Added domain to the WCS object. [#36]
• Added grid_from_domain function. [#36]
• The WCS object can return now an ~astropy.coordinates.SkyCoord or ~astropy.units.Quantity object. This is triggered by a new parameter to the __call__ method, output which takes values of "numericals" (default) or "numericals_plus". [#64]

API_Changes

• Added atol argument to LabelMapperDict, representing the absolute tolerance [#29]
• The CoordinateFrame.transform_to method was removed [#64]

Bug Fixes

• Fixed a bug in LabelMapperDict where a wrong index was used.[#29]
• Changed the order of the inputs when LabelMapperArray is evaluated as the inputs are supposed to be image coordinates. [#29]
• Renamed variables in read_wcs_from_header to match loop variable [#63]

0.5.1 (2016-02-01)

Bug Fixes

• Added ASDF requirement to setup. [#30]
• Import OrderedDict from collections, not from astropy. [#32]

0.5 (2015-12-28)

Initial release on PYPI.