メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.416500026212 43.7360901660697, 142.416544013136 43.7365818030409, 142.414241524071 43.7366976337141, 142.41366394865 43.7367266834703, 142.413596758311 43.7362397003065, 142.413562131464 43.7357450067313, 142.41351079915 43.7352221749762, 142.414103826503 43.7351971298607, 142.414146460553 43.735728693804, 142.416459231361 43.7356342112162, 142.416500026212 43.7360901660697)) ^^http://www.opengis.net/ont/geosparql#wktLiteral