Welcome to tweakwcs documentation!

tweakwcs is a package that provides core algorithms for computing and applying corrections to WCS objects such as to minimize mismatch between image and reference catalogs. Currently only aligning images with FITS WCS and JWST GWCS are supported.

Attention

Starting December 1st 2026, STScI will no longer test macOS x86 versions of software (Intel processors, including all Mac machines earlier than 2020). macOS x86 builds will still be available on PyPI and installable with pip install, but will not be tested for numerical accuracy.

Going forward, software testing for macOS will only be ARM64 (Apple Silicon).

Content

• imalign
  • NotEnoughCatalogs
  • align_wcs()
  • fit_wcs()
• WCS Correctors
  • FITSWCSCorrector
  • JWSTWCSCorrector
  • RomanWCSCorrector
  • ST_V2V3_WCSCorrector
  • WCSCorrector
• matchutils
  • MatchCatalogs
  • MatchSourceConfusionError
  • XYXYMatch
• wcsimage
  • RefCatalog
  • WCSGroupCatalog
  • WCSImageCatalog
  • convex_hull()
• linearfit
  • build_fit_matrix()
  • iter_linear_fit()
• wcsutils
  • planar_rot_3d()
• linalg
  • inv()
• LICENSE

Development Notes

• Release Notes

Indices and tables

• Index

• Search Page