メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.344204734037 44.4849895795381, 142.343972388759 44.4854472229893, 142.341504451912 44.4848029386908, 142.341345515252 44.4849405622793, 142.341126632933 44.484872498105, 142.341546055433 44.48406757649, 142.341683773971 44.4841181619147, 142.342127462056 44.4842357213763, 142.342638575796 44.4843711527287, 142.342717447457 44.4843920428916, 142.343458529548 44.4845884216521, 142.343390084608 44.4847359949066, 142.343370128614 44.4847790060424, 142.344204734037 44.4849895795381)) ^^http://www.opengis.net/ont/geosparql#wktLiteral