メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.578855441287 42.8805659153326, 141.579238792322 42.8808221321516, 141.579757947498 42.8811712080323, 141.579122133945 42.8817674006465, 141.57854206131 42.8823063538499, 141.578520661173 42.8823262359044, 141.578506604929 42.882339304893, 141.578022025246 42.8828065503165, 141.577867386592 42.8829428562428, 141.576921362584 42.882359306423, 141.57613554018 42.8818995611918, 141.576800080194 42.8813469472516, 141.57751130173 42.8807436142929, 141.578207909179 42.8801593927902, 141.578855441287 42.8805659153326)) ^^http://www.opengis.net/ont/geosparql#wktLiteral