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MOC - HEALPix Multi-Order Coverage map
Version 1.0

IVOA Working Draft 14 March 2013

Interest/Working Group:
Thomas Boch, Tom Donaldson, Pierre Fernique, Wil O'Mullane, Martin Reinecke, Mark Taylor
Pierre Fernique


This document describes the Multi-Order Coverage map method (MOC) to specify sky regions. The goal is to have a way for providing very fast comparisons and data access methods. The principle is based on HEALPix sky tessellation. It boils down to defining a list of sky cells, grouped hierarchically.

Status of this document

This is an IVOA Working Draft for review by IVOA members and other interested parties.
It is a draft document and may be updated, replaced, or obsoleted by other documents at any time.It is inappropriate to use IVOA Working Drafts as reference materials or to cite them as other than "work in progress".

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