メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.210848873245 42.9827533282658, 143.210683555653 42.9827361502696, 143.209632203899 42.9826475717528, 143.208633556622 42.982560089028, 143.207517386181 42.982473434755, 143.20601676594 42.9823285844872, 143.2066364555 42.9806172098675, 143.209781604789 42.9809021484714, 143.211136020509 42.9810102632272, 143.210848873245 42.9827533282658)) ^^http://www.opengis.net/ont/geosparql#wktLiteral