メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.991978272929 34.9799857089159, 136.991953485349 34.9800436325055, 136.991666417812 34.9797829248027, 136.991471125611 34.9795764365431, 136.991363968487 34.9794623332438, 136.991309454534 34.9792835159979, 136.991252757724 34.9789985649491, 136.991047115145 34.9781665500224, 136.991262414475 34.9780437631936, 136.992507670408 34.9787027059645, 136.991978272929 34.9799857089159)) ^^http://www.opengis.net/ont/geosparql#wktLiteral