メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.815483804061 35.2944067386195, 136.816119781464 35.2942636558636, 136.816133410092 35.2951510952889, 136.815715489411 35.2952312905085, 136.815503918832 35.2952789861499, 136.814512106425 35.2954946923781, 136.814393564029 35.2951696257793, 136.8140709804 35.2942010017627, 136.81459704302 35.2940857752707, 136.815271945453 35.2939390776691, 136.815484520569 35.2939020195287, 136.815483804061 35.2944067386195)) ^^http://www.opengis.net/ont/geosparql#wktLiteral