メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.328018725742 43.1200014769796, 141.328711510717 43.1207174322786, 141.328353450743 43.1209122345924, 141.327964315973 43.1211240145268, 141.32762697778 43.1213068147481, 141.327272117914 43.1214991062079, 141.326563407318 43.1207892727755, 141.325877177065 43.1200923455636, 141.326589320832 43.1196992080208, 141.326958202251 43.1194996465593, 141.327329030551 43.119310929642, 141.328018725742 43.1200014769796)) ^^http://www.opengis.net/ont/geosparql#wktLiteral