メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.057256966097 37.9383151804475, 139.057515578857 37.9383067712679, 139.058129369053 37.9398027762706, 139.057928952594 37.9398566634675, 139.057663260269 37.9399347949197, 139.057613126273 37.93995171802, 139.057604881045 37.9399544998671, 139.057473737506 37.9397064987122, 139.057415322347 37.9397214175585, 139.0573651306 37.9395948093415, 139.057374354498 37.9395923724562, 139.057302123029 37.9394073047659, 139.056929079228 37.9385191836536, 139.056879285179 37.9383451296291, 139.057256966097 37.9383151804475)) ^^http://www.opengis.net/ont/geosparql#wktLiteral