{"repo":"skyportal/healpix-alchemy","free":true,"listed":false,"github":"https://github.com/skyportal/healpix-alchemy","clone":"git clone https://github.com/skyportal/healpix-alchemy.git","description":"SQLAlchemy extensions for HEALPix spatially indexed astronomy data","language":"Python","stars":32,"topics":["astronomy","database","python"],"license":"BSD-3-Clause","category":"databases-storage","readme_excerpt":"To acknowledge HEALPix Alchemy in a scholarly article, please cite the following two references. HEALPix Alchemy paper Singer, L. P., Parazin, B., Coughlin, M. W., et al. (2022). \"HEALPix Alchemy: Fast All-Sky Geometry and Image Arithmetic in a Relational Database for Multimessenger Astronomy Brokers.\" Astronomical Journal 163 209. https://doi.org/10.3847/1538-3881/ac5ab8 Code archive on Zenodo Singer, L. P., Parazin, B., Coughlin, M. W., et al. (2022). \"skyportal/healpix-alchemy: Version 1.0.1.\" https://doi.org/10.5281/zenodo.5768564 HEALPix Alchemy The healpix alchemy Python package is an extension for the [SQLAlchemy] object relational mapper. It adds region and image arithmetic to [PostgreSQL] (version 14 and newer) databases. It accelerates queries between point clouds, regions, and images (sometimes known in the geospatial community as rasters) by storing [multi-order] [HEALPix] indices in PostgreSQL's [range types]. The healpix alchemy project is designed for astronomy applications, particularly for cross-matching galaxy catalogs, observation footprints, and all-sky images like [gravitational-wave probability sky maps] or even dust maps. However, it could be used in any context in which geometry is embedded on a unit sphere. healpix alchemy is lean and minimalist because it leverages several existing projects: it consists of little more than a few lines of glue code to bind together [MOCPy], [SQLAlchemy], and PostgreSQL's [range types]. healpix alchemy serves a purpose","default_branch":null,"files":null,"tree":[],"storefront":"/r/skyportal","claimed":false,"request_supported":{"post":"https://gitbuyer.com/r/skyportal/healpix-alchemy/request-supported","requests":0},"note":"indexed from public GitHub; nothing is for sale on this page. Clone it from GitHub. Paid listings live at /search."}