メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.444746306215 40.5115670907754, 141.442663967668 40.5109687682131, 141.441713374946 40.5106917526227, 141.442133426271 40.5098285853725, 141.442674679229 40.508751340676, 141.443228888636 40.5089247651624, 141.444125747416 40.5091797839375, 141.445712515101 40.5096370738685, 141.445229838342 40.5105774568177, 141.44519584465 40.5106961940032, 141.444924904308 40.5112062569673, 141.444746306215 40.5115670907754)) ^^http://www.opengis.net/ont/geosparql#wktLiteral