メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.929575320599 35.4803873466288, 136.929595762358 35.4809143222537, 136.92814634122 35.4809204490481, 136.927632098982 35.4809179546536, 136.927428329501 35.4805103680378, 136.927207977589 35.4801431716797, 136.928115961874 35.4800401793783, 136.928908634475 35.4799564256413, 136.929582240849 35.4798948619427, 136.929575320599 35.4803873466288)) ^^http://www.opengis.net/ont/geosparql#wktLiteral