メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.347380537154 44.4738931471902, 142.346980458927 44.4746873300541, 142.34695954485 44.474734388111, 142.342946146996 44.4737351846723, 142.343115158998 44.473369065936, 142.34332232175 44.4729202603119, 142.346526354951 44.473683672468, 142.34693199176 44.4737802892092, 142.347380537154 44.4738931471902)) ^^http://www.opengis.net/ont/geosparql#wktLiteral