メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.350211957169 44.4820213821237, 142.349281844258 44.4818284514565, 142.349586751205 44.4811874599751, 142.349610042865 44.4811385009904, 142.349634106121 44.4810879249172, 142.350472015192 44.4813055093583, 142.350211957169 44.4820213821237)) ^^http://www.opengis.net/ont/geosparql#wktLiteral