メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.48337711053 43.8820938799367, 142.482273998274 43.8828024619969, 142.48103518459 43.8836435691629, 142.479503690803 43.8824228176244, 142.479973144275 43.8821113422997, 142.480765547024 43.8816016064335, 142.482066224484 43.8807354569659, 142.483418230191 43.8818502723634, 142.48337711053 43.8820938799367)) ^^http://www.opengis.net/ont/geosparql#wktLiteral