メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.406299138861 43.7840155443344, 142.406818388416 43.7843243811068, 142.407332889459 43.7846471289103, 142.406767697338 43.7851278650285, 142.405996470084 43.7857584163458, 142.405477145434 43.7854287075425, 142.404979475009 43.7851146312616, 142.40448424415 43.7848126976268, 142.403912046205 43.7844447969831, 142.40496108627 43.7835739119181, 142.405267679687 43.7833335249132, 142.405810938566 43.7837016874127, 142.40581829152 43.7837066704911, 142.406299138861 43.7840155443344)) ^^http://www.opengis.net/ont/geosparql#wktLiteral