[postgis-users] ST_Contains(a.coordinates::::geometry, b.coordinates::::geometry)

[Antonio Rodriges]

Thank you, Sandro,

yes, I clearly understand this, but all my contours are CLOSED and
NONE of them intersects each other. many of them contain each other.
actually, they are like isobars on synoptic map,

please, see for ex
http://1.bp.blogspot.com/_a1AVUIK5Er8/S27QJhQijOI/AAAAAAAAI88/NUJE11Me6n4/s1600-h/Synoptic+Chart.jpg