メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.385778843513 43.7697016875332, 142.385769599533 43.7698075503008, 142.38574333276 43.7702431044411, 142.385719942379 43.7707268082019, 142.383701942435 43.7706684708264, 142.383724747553 43.7701701763704, 142.38374675418 43.7696460402261, 142.383802968627 43.7690738338239, 142.385798354787 43.769149986529, 142.385778843513 43.7697016875332)) ^^http://www.opengis.net/ont/geosparql#wktLiteral