メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.367192413631 43.1190537418009, 141.365701354882 43.1188525564443, 141.365998919433 43.1176851390118, 141.366973238126 43.1178137626775, 141.367505563669 43.1178818662718, 141.367381251474 43.1182875285468, 141.367285725327 43.1186409492527, 141.367192413631 43.1190537418009)) ^^http://www.opengis.net/ont/geosparql#wktLiteral