<div dir="ltr"><div><div><div><div></div>I general we came to the conclusion that trying to support STC in ADQL/TAP was a bad idea because it caused a lot of other pain. In fact, the STC usage in TAP is at best "try this out" because it is in a non-normative section of the document in TAP-1.0 and is being removed in favour of simpler DALI geometry support. (I'm not including complete metadata about columns in the VOTable header part -- that is still a good tuing to do and hopefully vo-dml will formalise that.)<br><br></div>That said, simpler meant removing the coordinate system metadata and starting with a few commonly needed shapes... I'm not too picky about which definition of polygon we go with or think is best and it probably isn't too late to argue for an erratum if you think the inconsistency between SIAv2 "polygon" and STC is a bug in the spec. Or, one could just say that the SAIv2 polygon as used in POS is an idiosyncratic case and instead target the polygon as defined in WD-DALI-1.1 to be the one that is consistent with STC and/or able to cover more than half the sphere... that is a WD that will effect SODA-1.0, TAP-1.1, etc.<br><br></div>Pat<br><br></div><div><div><div><div> <br><br></div></div></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Feb 10, 2016 at 1:46 PM, Walter Landry <span dir="ltr"><<a href="mailto:wlandry@caltech.edu" target="_blank">wlandry@caltech.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">Patrick Dowler <<a href="mailto:pdowler.cadc@gmail.com">pdowler.cadc@gmail.com</a>> wrote:<br>
> I assume "complicates our implementation" means "have to compute the<br>
> winding direction and maybe reverse vertex order"?<br>
<br>
</span>The trouble is just that it is different. I would like to use the<br>
same underlying implementation for TAP and SIA. Also, the SIA version<br>
makes it impossible to select more than half the sphere. So a search<br>
doing something like excluding the galactic plane would be impossible.<br>
<br>
Cheers,<br>
Walter Landry<br>
</blockquote></div><br><br clear="all"><br>-- <br><div class="gmail_signature"><div dir="ltr"><div><div>Patrick Dowler<br></div>Canadian Astronomy Data Centre<br></div>Victoria, BC, Canada<br></div></div>
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