メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.308202780768 40.1709379810386, 141.305973902211 40.1709059028997, 141.306123898916 40.1697596968623, 141.306309933984 40.1684089733715, 141.306525417635 40.1684283023059, 141.307180101933 40.1684887495041, 141.307374866692 40.1685092697733, 141.307591977582 40.1685510345701, 141.307798497375 40.1686653549815, 141.307960912333 40.1688267882965, 141.308178648064 40.1691149836335, 141.30831781396 40.1694469357804, 141.30835742827 40.1696684559059, 141.308230927792 40.1700715340967, 141.308264112402 40.1704622730116, 141.308202780768 40.1709379810386)) ^^http://www.opengis.net/ont/geosparql#wktLiteral