Montage Mosaic¶

This application is based on the Parsl implementation of the Montage Getting Started tutorial.

The Montage Mosaic application takes a directory of input astronomy images and stitches them into a single mosaic using Montage tools.

Installation¶

This application requires additional package dependencies and for the Montage binaries to be installed. We suggest using Conda so the correct compilers for Montage can be installed.

conda create --name taps-montage python=3.11
conda activate taps-montage
conda install -c conda-forge gcc=9.5 libnsl
pip install -e .[montage]

Warning

Build instructions may be different depending on your system. Here we used Ubuntu 22.04.

Next, download, build, and install Montage, available at http://montage.ipac.caltech.edu/docs/download2.html. We will do this inside of our Conda environment directory.

cd $CONDA_PREFIX
curl -L http://montage.ipac.caltech.edu/download/Montage_v6.0.tar.gz | tar -xz
cd Montage
make
export PATH="$CONDA_PREFIX/Montage/bin:$PATH"

You can now return to your TaPS directory.

Data¶

Input data available at http://montage.ipac.caltech.edu/docs/Kimages.tar. The following command will download and extract the tarfile to data/Kimages.

curl -L http://montage.ipac.caltech.edu/docs/Kimages.tar | tar -x -C data/

Example¶

The application can be invoked using the downloaded data.

python -m taps.run --app montage --app.img-folder data/Kimages --engine.executor process-pool

Failure

If you get an error like:

montage_wrapper.status.MontageError: mProject: File (/home/cc/taps/data/Kimages/._aK_asky_990502s1350092.fits) is not a FITS image

This is a side-effect of the tarfile being created on MacOS and MacOS using these special files for extra information. Simply remove those files from the image directory.

rm -rf data/Kimages/._*

This will produce a single final FITS file within data/ inside of the run directory.