メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.29864626948 43.0813679616714, 141.29866870013 43.0813692734189, 141.299097139908 43.0813912600501, 141.29896806923 43.0823913216058, 141.298966324311 43.0824048804916, 141.298525173176 43.0823730114591, 141.297812538103 43.0823196111997, 141.297726182195 43.0823136182609, 141.296664386508 43.082236136193, 141.296717387773 43.0818376713812, 141.296768748125 43.0814274477912, 141.296769035989 43.0814088833189, 141.29679337817 43.081237412983, 141.298135815681 43.0813384684538, 141.29864626948 43.0813679616714)) ^^http://www.opengis.net/ont/geosparql#wktLiteral