メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.418952756059 43.7993970897338, 142.419106171743 43.7994893021916, 142.41955588187 43.799789104503, 142.420022534544 43.8000703681579, 142.420487078316 43.8003470269528, 142.419284155578 43.801346464291, 142.418230949453 43.8006754589608, 142.417779211206 43.8004049422228, 142.417181871967 43.8000360287974, 142.417054711474 43.7999543933064, 142.416784436724 43.799778385882, 142.41666393851 43.7997128792419, 142.417850074476 43.7987049141771, 142.418688509921 43.7992341575925, 142.418952756059 43.7993970897338)) ^^http://www.opengis.net/ont/geosparql#wktLiteral