standards > model/format > DOI:10.25504/FAIRsharing.WQLolR


ready HEALPix Multi-Order Coverage Map

Abbreviation: MOC


General Information
This document describes the Multi-Order Coverage map method (MOC) to specify arbitrary sky regions. The goal is to be able to provide a very fast comparison mechanism between coverage maps. The mechanism is based on the HEALPix sky tessellation algorithm. It is essentially a simple way to map regions of the sky into hierarchically grouped predefined cells. The encoding method described in this document allows one to define and manipulate any region of the sky in such a way that basic operations like union, intersection, equality test can be performed very efficiently. It is dedicated to Virtual Observatory (VO) applications or VO data servers for building efficient procedures for which mapping knowledge is required like generic catalog cross-match, computation of data set intersections, or similar operations.

Homepage http://ivoa.net/documents/MOC/index.html

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Created in 2014

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How to cite this record FAIRsharing.org: MOC; HEALPix Multi-Order Coverage Map; DOI: https://doi.org/10.25504/FAIRsharing.WQLolR; Last edited: May 8, 2020, 3:46 p.m.; Last accessed: Jun 21 2021 9:36 p.m.

Publication for citation  MOC - HEALPix Multi-Order Coverage map Version 1.0 Fernique, Pierre; Boch, Thomas; Donaldson, Tom; Durand, Daniel; O'Mullane, Wil; Reinecke, Martin; Taylor, Mark; SAO/NASA Astrophysics Data System ; 2014.


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Record added: March 15, 2018, 8:15 p.m.
Record updated: May 8, 2020, 1:31 p.m. by The FAIRsharing Team.

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International Virtual Observatory Alliance (IVOA)


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online documentation MOC Wiki

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Download Standard (PDF) http://ivoa.net/documents/MOC/20140602/REC-MOC-1.0-20140602.pdf
Download Standard (ODT) http://ivoa.net/documents/MOC/20140602/REC-MOC-1.0-20140602.odt



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MOC - HEALPix Multi-Order Coverage map Version 1.0

Fernique, Pierre; Boch, Thomas; Donaldson, Tom; Durand, Daniel; O'Mullane, Wil; Reinecke, Martin; Taylor, Mark
SAO/NASA Astrophysics Data System 2014

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