メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.399437122742 36.7544682616842, 138.399314138074 36.7546353037359, 138.399153354366 36.7548175927954, 138.398888640361 36.7550452775832, 138.398746724298 36.7552427892181, 138.398509956973 36.7557593067655, 138.396693147572 36.7551062643063, 138.39683362482 36.7542769183876, 138.397238231633 36.7535995995067, 138.398875282198 36.7542013653752, 138.399437122742 36.7544682616842)) ^^http://www.opengis.net/ont/geosparql#wktLiteral