メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.368381503375 43.068560820844, 141.367181397153 43.068585400439, 141.367291628789 43.0680763599922, 141.367238360062 43.0680718000723, 141.367287689926 43.0678360133289, 141.367302619525 43.0677649553089, 141.367808964702 43.0678282869572, 141.367793527615 43.0679080624537, 141.368493579584 43.0680093859657, 141.368381503375 43.068560820844)) ^^http://www.opengis.net/ont/geosparql#wktLiteral