メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.914423906786 35.0734674671904, 136.914465678824 35.0738738461461, 136.914504526731 35.074284656071, 136.914549531673 35.0746777315305, 136.914589180987 35.0750783303828, 136.912905120562 35.07487054125, 136.912850529328 35.0745128003014, 136.912821699026 35.0743383640923, 136.912792869947 35.0741639269801, 136.91273530455 35.0738128001785, 136.912678321056 35.0734461098976, 136.912657018769 35.0732896482418, 136.914404156241 35.0732710054248, 136.914423906786 35.0734674671904)) ^^http://www.opengis.net/ont/geosparql#wktLiteral