メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.576921362584 42.882359306423, 141.577867386592 42.8829428562428, 141.577135169461 42.8836370072325, 141.57692985549 42.8837937624424, 141.576785970164 42.8837009915281, 141.575964706774 42.8838345629957, 141.575100639138 42.8839991737698, 141.574783789383 42.8841000559007, 141.574624977603 42.8841838672109, 141.5744660176 42.8842812512828, 141.573292860787 42.8846624708887, 141.573022041445 42.8844841245173, 141.574413135473 42.8833188759401, 141.575176705266 42.882690405205, 141.57613554018 42.8818995611918, 141.576921362584 42.882359306423)) ^^http://www.opengis.net/ont/geosparql#wktLiteral