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<p>Dear HiPS providers, contributors and users,</p>
<p>The CDS is presently processing a big update all his HiPS by
adding the low HiPS orders (Norder0 to 2) - (see IVOA Apps last
Interop meeting to have the rational of this action => <a
moz-do-not-send="true"
href="https://wiki.ivoa.net/internal/IVOA/InterOpMay2018Apps/IVOA_Apps_HiPS_news.pdf">slide
12-13 of this presentation</a>). During this operation, the
properties file associated to each HiPS will be cleaned (removing
obsoleted keys) and upgraded to be fully HiPS 1.0 compatible.
Notice that the Allsky.fits, .png, .jpg will be kept for
compatibility but could be deprecated in the future.<br>
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<p>This release will start tomorrow for the fifty main used HiPS.
This update should be transparent. But do not hesitate to contact
us if you detect any problem by using your favorite HiPS client.
If we do not receive complaints, we will continue with all other
CDS HiPS 10 days later.<br>
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<p>In a second step, in order to keep an homogeneous set of HiPS
over the HiPS network :</p>
<ul>
<li>We will encourage all HiPS creators to update their own HiPS
if they do not already provide low orders (notably if you have
generated your HiPS by an Aladin/Hipsgen <10.084 (1 year old)
). This operation can be realized by using a new version of
Aladin/Hipsgen with UPDATE action (>10.123 - distributed soon).
It is fast (a few seconds per HiPS) and do not require original
images.</li>
<li>The HiPS nodes mirroring external HiPS will have to
synchronize their copies to retrieve low orders and the updated
properties file (for instance by Hipsgen MIRROR action)</li>
</ul>
<p>Do not hesitate to contact us if more details are required.<br>
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<p>Best regards<br>
Pierre Fernique<br>
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