メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.101232966945 38.4741750501902, 141.100757693188 38.4742123148074, 141.100116097863 38.4742627670149, 141.099532634788 38.4743091419129, 141.099460525672 38.473799022509, 141.099245796398 38.4722802028209, 141.100403027394 38.4721842362834, 141.101582679625 38.4720870806521, 141.10180280976 38.4736117977561, 141.101876617149 38.4741228978875, 141.101232966945 38.4741750501902)) ^^http://www.opengis.net/ont/geosparql#wktLiteral