name:: query against coverage
query::
select accref, seeing 
from cars.images 
where 1=intersects(coverage, circle('ICRS', 34, -4, 2)) 
order by seeing
description::This is an example for querying against geometric columns,
in particular coverage.  For other relations, there is also ADQL's
contains function.  Of course, this does not only concern 
:taptable:`cars.images` but all SIAP tables and of course
:taptable:`ivoa.obscore`.
..