メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.044428165911 42.9054617118639, 143.04448121912 42.9054655638517, 143.044889745048 42.9054956491436, 143.045178233171 42.9055168587731, 143.045000196239 42.9068192558227, 143.044702128618 42.9068013474875, 143.044232863197 42.906773089031, 143.043620261716 42.9067362553389, 143.043787748605 42.9054145219757, 143.044428165911 42.9054617118639)) ^^http://www.opengis.net/ont/geosparql#wktLiteral