Hierarchical progressive surveys. Multi-resolution HEALPix data structures for astronomical images, catalogues, and 3-dimensional data cubes
P. Fernique, M. G. Allen, T. Boch, A. Oberto, F-X. Pineau, D. Durand,, C. Bot, L. Cambresy, S. Derriere, F. Genova, F. Bonnarel

TL;DR
The paper introduces HiPS, a hierarchical multi-resolution scheme based on HEALPix for organizing, visualizing, and analyzing large, heterogeneous astronomical datasets efficiently across various data types.
Contribution
It presents HiPS as a practical, interoperable hierarchical data structure for managing diverse astronomical data, extending it to images, catalogues, and data cubes.
Findings
HiPS has been adopted for ~200 data collections.
Enables efficient visualization in tools like Aladin.
Facilitates scientific analysis of large datasets.
Abstract
Scientific exploitation of the ever increasing volumes of astronomical data requires efficient and practical methods for data access, visualisation, and analysis. Hierarchical sky tessellation techniques enable a multi-resolution approach to organising data on angular scales from the full sky down to the individual image pixels. Aims. We aim to show that the Hierarchical progressive survey (HiPS) scheme for describing astronomical images, source catalogues, and three-dimensional data cubes is a practical solution to managing large volumes of heterogeneous data and that it enables a new level of scientific interoperability across large collections of data of these different data types. Methods. HiPS uses the HEALPix tessellation of the sphere to define a hierarchical tile and pixel structure to describe and organise astronomical data. HiPS is designed to conserve the scientific…
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Taxonomy
TopicsGalaxies: Formation, Evolution, Phenomena · Remote Sensing in Agriculture · Stellar, planetary, and galactic studies
