メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.366676188084 43.0558139739425, 141.365410414069 43.0566122969786, 141.364437034691 43.0557130572787, 141.364946777397 43.0553927089196, 141.366191130833 43.0546056988379, 141.366524142644 43.0543962263193, 141.366658846758 43.0543121663043, 141.366824118414 43.0542030943947, 141.367841654651 43.0550935116889, 141.367048650004 43.0555794235405, 141.366809024068 43.0557301910124, 141.366676188084 43.0558139739425)) ^^http://www.opengis.net/ont/geosparql#wktLiteral