メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.993886934468 34.9979892956351, 136.993907203954 34.9984249808631, 136.993934547181 34.9988645489091, 136.993961849292 34.9993034831422, 136.991833251747 34.9994732188414, 136.991720041749 34.9986468155829, 136.991715675508 34.9986371609579, 136.991602405393 34.9979118192733, 136.992358597042 34.9976262884123, 136.993631979227 34.9971184619031, 136.993847434991 34.9970359520496, 136.993886934468 34.9979892956351)) ^^http://www.opengis.net/ont/geosparql#wktLiteral