HealPixProjection

HealPixProjection is a project to allow easy and efficient projection of healpix maps onto planar grids. It can be used as a standalone program cutsky

$ cutsky 0.0 0.0 --mapfilenames HFI_SkyMap_857_2048_R2.00_full.fits

or as a python function

from hpproj import cutsky
result = cutsky([0.0, 0.0], maps={'Planck 857': {'filename': 'HFI_SkyMap_857_2048_R2.00_full.fits'}} )

or as a python class, for optimization when producting several cuts

from hpproj import CutSky, to_coord
cutsky = CutSky({'Planck 857': {'filename': 'HFI_SkyMap_857_2048_R2.00_full.fits'}})
result = cutsky.cut_fits(to_coord([0., 0.])

Note

For science applications requiring high photometric accuracy, we recommend the drizzlib software developed by CADE, which uses a flux-conserving drizzling method to reproject data between HEALPix and local WCS. Drizzlib is available as standalone software (IDL python) here: http://cade.irap.omp.eu/dokuwiki/doku.php?id=software . An online interface, drizzweb, is available here: http://drizzweb.irap.omp.eu/ .

Features

• Galactic and equatorial system supported
• All projection system from wcslib
• Project several healpix maps at once, efficiently !
• Output in fits, png or votable for the central point source photometry

Installation

Install hpproj using pip :

$ pip install hpproj

or by running setuptools on source

$ python setup.py install

Contribute

• Issues Tracker
• Source Code

Support

If you are having issues, please let us know.

License

This project is licensed under the LGPL+3.0 license.