HiPS big upgrade in progress

[Pierre Fernique]

Dear HiPS contributors and providers,

As we announced a few weeks ago, according to the IVOA discussion at 
Victoria Interop, *CDS has upgraded all his HiPS* for generating their 
low orders [0 to 2] to allow the usage of simplified HiPS client display 
algorithms. It is done and operational since a few weeks on the CDS servers.

If you have mirrored some of these HiPS,*it is now time to update your 
copies*. The simplest method is to use Hipsgen tool (lastest version 
here <http://aladin.unistra.fr/java/Hipsgen.jar>) with "MIRROR" action. 
Notice that only additional tiles and the properties file will be copied 
(should take a few minutes per HiPS)
java -jar Hipsgen.jar -check in=http://alasky.u-strasbg.fr/...." 
out=targetDir MIRROR

Warning:  if you do not synchronize your HiPS mirrors, they will be 
ignored by HiPS clients which will be assuming that your copies are 
obsolete (notably Aladin Desktop).

Parallelly, if you have produced your own HiPS, it is also recommended 
to upgrade them for *generating their low order tiles*. Again, use 
Hipsgen tool (lastest version) with the "UPDATE" action
java -jar Hipsgen.jar out=TargtDir UPDATE
When it will be done, your own mirror sites will have to MIRROR your 
HiPS (notably CDS)

Do not hesitate to contact us in case of doubts or problems.
Best regards
Pierre Fernique



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