メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.484087376753 43.8838891655704, 142.483837651814 43.8840561761678, 142.482592068907 43.8848891577676, 142.48103518459 43.8836435691629, 142.482273998274 43.8828024619969, 142.48337711053 43.8820938799367, 142.483418230191 43.8818502723634, 142.484449944078 43.8826551892064, 142.485143122593 43.8831934504052, 142.484126358595 43.8838630937058, 142.484087376753 43.8838891655704)) ^^http://www.opengis.net/ont/geosparql#wktLiteral