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 If the dataloader can (or must) not detect position keywords, it attempts to find them out automatically by checking first UCDs/Utypes, then keywods and then WCS for images :
 * Search by UCDs or UTYPEs :
| ucd |
pos.eq.ra(dec);meta.main
pos.eq.ra(dec)
pos.eq;meta.main
pos.eq
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| utype |
sed:Target.pos |
The first keyword(s) matching any of these conditions will be taken as position
- Search by keywords : If the search by UCDs or UTYPEs fails, the dataloader will look at keyword names matching the following regular expressions
| Ascension |
(_ra)|(_ra.?(2000)?)|(_ra.?[^(dec)]?)|(_ra.?obj) |
| Declination |
(_de)|(_dec)|(_dec.?(2000)?)|(_de.?(2000)?)|(_dec.?[^(ra)]?)|(_dec.?obj)|(_de.?obj) |
We let RegExp experts enjoying to decode that.
- Search by WCS keywords (for images only) : If previous searches fail both, the image center computed with WCS keywords is taken.
last update 2008-05-13
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Automatic detection of Position Keywords
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