メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.904885853488 43.4740658767735, 141.90396685293 43.4741789028513, 141.903726226691 43.4733737018877, 141.903713039011 43.4733370232455, 141.903308024959 43.4719271335235, 141.904299025 43.4717686524423, 141.904352013824 43.4717600559581, 141.904670849988 43.4730972489982, 141.904626175308 43.4731037957415, 141.904885853488 43.4740658767735)) ^^http://www.opengis.net/ont/geosparql#wktLiteral