メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.871933166563 35.1144308791956, 136.871921227183 35.1149122952438, 136.871905604344 35.1153173706924, 136.870168886893 35.1152783664821, 136.870195646243 35.1144523685206, 136.870205491885 35.1140067925525, 136.87194453545 35.1140055137282, 136.871933166563 35.1144308791956)) ^^http://www.opengis.net/ont/geosparql#wktLiteral