メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.044717889104 42.9039419848283, 143.04485579068 42.9039525640337, 143.045308905291 42.903987541948, 143.045390974979 42.9039938659958, 143.045178233171 42.9055168587731, 143.044889745048 42.9054956491436, 143.04448121912 42.9054655638517, 143.044428165911 42.9054617118639, 143.043787748605 42.9054145219757, 143.044006541173 42.9038870598335, 143.044352015759 42.9039137851015, 143.044717889104 42.9039419848283)) ^^http://www.opengis.net/ont/geosparql#wktLiteral