メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.949118437648 37.7919042845098, 140.945658952263 37.7918250568206, 140.945672099359 37.791299670851, 140.945656101623 37.7904335820082, 140.947784026047 37.7897377237269, 140.948183424962 37.7896070997257, 140.949118437648 37.7919042845098)) ^^http://www.opengis.net/ont/geosparql#wktLiteral