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<ri:Resource created="2017-06-12T13:36:00Z" status="active" updated="2026-03-04T11:08:16Z" version="1.2" xmlns:ri="http://www.ivoa.net/xml/RegistryInterface/v1.0" xmlns:vs="http://www.ivoa.net/xml/VODataService/v1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.ivoa.net/xml/VODataService/v1.1 http://vo.ari.uni-heidelberg.de/docs/schemata/VODataService.xsd" xsi:type="vs:CatalogService"><title>HI4PI NHI survey (full-sky HI column density distribution) survey collection</title><shortName>HI4PI NHI</shortName><identifier>ivo://CDS/P/HI4PI/NHI</identifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Buga M.</name></creator><date role="Created">2017-06-12T13:36:00Z</date><date role="Updated">2019-05-22T05:04:00Z</date><contact><name>CDS Helpdesk</name><email>cds-question@unistra.fr</email></contact></curation><content><subject>Sky survey</subject><subject>Radio astronomy</subject><subject>H I line emission</subject><subject>Milky Way disk</subject><description>The HI4PI data release comprises 21-cm neutral atomic hydrogen data of the Milky Way (-600km/s%3Cvlsr%3C+600km/s for declination &gt;0deg; -470km/s%3Cvlsr%3C+470km/s for declination %3C0deg) as observed with the 100-m radio telescope at Effelsberg and the 64-m radio telescope at Parkes. HI4PI covers the full 4-pi sky.Original acknowledgement for data: Benjamin Winkel, bwinkel(at)mpifr.de</description><source format="bibcode">2016A&amp;A...594A.116H</source><referenceURL>https://alasky.cds.unistra.fr/HI4PI/P_HI4PI_NHI</referenceURL><type>Survey</type><contentLevel>Research</contentLevel><relationship><relationshipType>IsDerivedFrom</relationshipType><relatedResource>VizieR Service, CDS (ftp : J/A+A/594/A116/)</relatedResource></relationship></content><rights rightsURI="https://cds.unistra.fr/aladin-org/licences_aladin.html">This HiPS is distributed under ODbL license by Unistra/CNRS</rights><capability standardID="ivo://ivoa.net/std/hips#hips-1.0"><interface role="std" xsi:type="vs:ParamHTTP"><accessURL use="base">https://alasky.cds.unistra.fr/HI4PI/P_HI4PI_NHI</accessURL><mirrorURL>https://alaskybis.cds.unistra.fr/HI4PI/P_HI4PI_NHI</mirrorURL><mirrorURL>https://casda.csiro.au/hips/HI4PI/P_HI4PI_NHI</mirrorURL><mirrorURL>http://skies.esac.esa.int/HI4PI</mirrorURL></interface></capability><coverage><temporal>54812 56293</temporal><spectral>9.45926598642347e-25 9.45926598642347e-25</spectral><footprint ivo-id="ivo://mocivod">https://alasky.cds.unistra.fr/HI4PI/P_HI4PI_NHI/Moc.fits</footprint><waveband>Radio</waveband></coverage></ri:Resource>