Generalized World Coordinate System (GWCS) is an Astropy affiliated package providing tools for managing the World Coordinate System of astronomical data.
GWCS takes a general approach to the problem of expressing transformations between pixel and world coordinates. It supports a data model which includes the entire transformation pipeline from input coordinates (detector by default) to world coordinates. It is tightly integrated with Astropy.
- Transforms are instances of
astropy.Model. They can be chained, joined or combined with arithmetic operators using the flexible framework of compound models in astropy.modeling. - Celestial coordinates are instances of
astropy.SkyCoordand are transformed to other standard celestial frames using astropy.coordinates. - Time coordinates are represented by
astropy.Timeand can be further manipulated using the tools in astropy.time - Spectral coordinates are
astropy.Quantityobjects and can be converted to other units using the tools in astropy.units.
For complete features and usage examples see the documentation site.
To install:
pip install gwcs
To clone from github and install the master branch:
git clone https://github.com/spacetelescope/gwcs.git cd gwcs pip install --editable .
We welcome feedback and contributions to the project. Contributions of code, documentation, or general feedback are all appreciated. Please follow the contributing guidelines to submit an issue or a pull request.
We strive to provide a welcoming community to all of our users by abiding to the Code of Conduct.
If you use GWCS, please cite the package via its Zenodo record.