WD-AccessData-1.0-20140312

[Patrick Dowler]

On 13/03/14 03:31 PM, Petr Skoda wrote:
> the biggest mistake of SIA 1.0 is there is not primary the concept of
> filters built-in - I am just in troubles trying to access the multi
> colour survey.
>
> I do not believe the most use cases can be solved by stating
> wavelengths in BAND....


Are you talking about searching for data in the R band? You need to look 
at the SIA-2.0 {query} capability; this defines query parameters for 
discovering data. While it isn't perfect and it isn't trivial, one can 
write a numeric query of the ObsCore model such that most of the 
returned data is in a band very much like R. Applications could help 
users formulate such queries. If you want to propose something more on 
the query side, please do so, but it will probably not be considered in 
scope until SIA-2.1

Or are you talking about creating a virtual R-band image out of a 3d 
cube? If you are talking about a virtual image from a cube, the only 
kind of access that is in scope for AccessData-1.0 is simple extraction 
is subsets. All other kinds of operations are to be considered later in 1.x

PS-It is by design that the numeric BAND parameter is the same in SIA 
and AccessData, because they both specify a value or interval on the 
spectral axis. However, the two capabilities do different things now and 
will diverge further (in allowed parameters) in subsequent versions.


-- 

Patrick Dowler
Canadian Astronomy Data Centre
National Research Council Canada
5071 West Saanich Road
Victoria, BC V9E 2E7

250-363-0044 (office) 250-363-0045 (fax)