メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.982608058475 43.5430678171831, 144.982042915325 43.5426826997541, 144.982166524133 43.5425729991221, 144.982705318536 43.5420933693233, 144.983258148137 43.5424584570454, 144.983279071301 43.5424722307319, 144.982608058475 43.5430678171831)) ^^http://www.opengis.net/ont/geosparql#wktLiteral