Thomas Robitaille

Results 433 issues of Thomas Robitaille

This is a meta issue to think about/discuss dask support - because there are actually a number of different aspects to consider # Internal dask usage Since https://github.com/astropy/reproject/pull/314 was merged,...

We have a wrapper of map_coordinates in array_utils.py which pads the array before being called - however this causes the input array to be loaded into memory, whereas if we...

performance

It's possible to use https://github.com/astropy/reproject/blob/master/reproject/mosaicking.py#L17 to find a WCS that is north-aligned, but we could probably have a simpler function that takes a single image and a reprojection function and...

enhancement
Package-novice
Effort-intermediate

cc @perrygreenfield

enhancement
help-wanted

When reprojecting large images, we may run into memory issues for storing the corners or centers of all pixels, so we should have a way to project chunk by chunk...

enhancement

This would need to take a HDU object since WCS doesn't technically contain the dimensions of the image, only the projection information. I think astropy.wcs.WCS does contain the naxis info,...

help-wanted

As discussed in #3, we can write a routine directly at the C level to compute polygon areas (rather than relying on `compute_overlap` as in #3).

c-extension

The current test coverage is around 50%, so we should work on improving that: https://coveralls.io/r/astropy/pyregion Of course, we shouldn't try and improve coverage of e.g. `kapteyn_celetial.py` since this is an...

tests
enhancement

It would be nice to add a tutorial specifically on how reproject can be used to make plots with multiple images overlaid in the same figure.

enhancement
Documentation

Currently we can pass weights to reproject_and_coadd but it might be nice to provide a way to provide boolean masks (which could then easily be generated from data quality arrays).

enhancement