メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.404785852603 43.7352460118713, 142.405390336207 43.7352067195322, 142.405409291746 43.7354600255517, 142.40544279509 43.7358220453033, 142.404696949337 43.7360545937974, 142.404244543757 43.7361758678319, 142.403864343253 43.7362709202857, 142.403505201066 43.7363280407971, 142.403119958666 43.7363662959533, 142.401410994109 43.7364558278386, 142.401325527771 43.7354708803672, 142.403033948475 43.735359867704, 142.403560122197 43.7353256812716, 142.404785852603 43.7352460118713)) ^^http://www.opengis.net/ont/geosparql#wktLiteral