メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.854894619413 43.3256238008696, 141.854671642226 43.3256576350054, 141.85400857045 43.3257687176576, 141.85329544319 43.3233837681229, 141.853955189385 43.3232773166495, 141.854237320587 43.3232370768495, 141.854662942018 43.3246284996527, 141.855025640586 43.3245570990379, 141.855357520359 43.3255497206787, 141.854894619413 43.3256238008696)) ^^http://www.opengis.net/ont/geosparql#wktLiteral